USER MANUAL
Contents
1. The Control Plat of Slit Slit Height Control Knob Filter Selection Lever and display mark The lever can choose different filters Aperture Slit Height and Display Window It will display the diameter of the slit and the aperture Lamp Cap With the function of protecting and insulating its normal working temperature is around 51 C The plug of Lamp cap It is connected with the power of the light unit The Fixation Knob of Lamp Cap After fixing the knob the lamp cap will not move Fixation target Make the patient stare at it it is convenient for checking Rotate this knob to adjust the spot and the slit height Swing the knob horizontally to revolve the slit Forehead Belt To fix the patient s head on an appropriate position Gilras LLC 8 Version 1 0 SLIT LAMP USER MANUAL 20 Focus test rod 21 The Fixation Knob of Chin rest Paper It is used to fix the chin rest paper 22 Chin rest 23 Centering Knob of illumination unit Loosen the knob to allow the illumination light to move from the center of the vision field for indirect retro illumination Fastening the knob can bring the illumination light back to the center 24 Slit Width Control Knob The slit width is continuously adjustable within the range from 0 to 14mm The marks on the left knob stands for the approximant value of the width 25 Illumination Inclination Lever Four inclination stops are available from 5 up to 20 The interval between each is 5 26 Chin2. TROUBLE SHOO TING GUIDE ada caioda ocean oisoscaide 21 ALLENDE dices 22 APRENDE a enn wn e N 22 Gilras LLC 6 Version 1 0 SLIT LAMP USER MANUAL 1 Nomenclature Gilras LLC Version 1 0 SLIT LAMP USER MANUAL 10 11 12 13 14 15 16 17 18 19 Main Power Switch Brightness Control Switch The brightness can be adjusted continuously Avoid working continuously at high setting as the service life of the bulb will be shortened Joystick Incline joystick to move the instrument slightly on the horizontal surface and rotate it to adjust the elevation of the microscope Microscope Arm Locking Knob Lock the rotational movement of the microscopes arm Illumination Arm Locking Knob Lock the rotational movement of the illumination arm The indicate of relative angle between the microscope and illumination unit Mark on the angle mark ring of the illumination arm which relates to the long mark of the microscope arm represent the two arms angle when the 0 on the ring relates to the short mark at one side of the operator the right eyepiece may be blocked and the side of the patient the left eyepiece The mark of microscope arm Together with 6 to indicate the angle between the microscope and illumination unit Magnification Select Dial Five different magnifications are provided Prism Box Separate the prism box to adjust the inter papillary distance until it fit for checking 12 5X Eyepieces
3. is a limit groove on the socket Please align the plug with the groove Power box socket Gilras LLC 22 Version 1 0 SLIT LAMP USER MANUAL 1 Please connect the slit lamp with power supply as fig 1 shows Refer to Fig 2 take out the link wire of brightness control knob on the base and connect it to the corresponding socket on the power box Refer to Fig 3 insert the plug of chin rest bracket in the correct socket and fasten it Neon Make sure the main power plug is not connected 2 Check the voltage selector this power box support working under the voltage of 110V and 220V Please select the right voltage according to the voltage in your country Aca Wrong power selection may lead to damage of the instruments 3 Open the fuse box and make sure there is a fuse assembled as Fig 4 shows Specification of the fuse 110V 2A 125V 220V 1A 250V 4 Insert the main power cable and turn on the switch Referring to the instruction of brightness control knob the brightness of the bulb is adjustable 5 Please do unplug all the cables connected between slit lamp and the power box when moving the slit lamp to a new place in case there is any danger caused Subject to change in design or specifications without advance notice version 1 0 Gilras LLC 23
4. rest Elevation Adjustment Knob Rotate the knob to adjust the elevation of the chin rest 27 Access line and plug of the brightness control 28 Rail Cover Protect the rail surface 29 Work Table Gilras LLC Version 1 0 2 Assembly SLIT LAMP USER MANUAL This section of the manual describes how to assemble the slit lamp All parts should be taken out with great care from the packing case before assemblin g 2 1 Check List NAME HEAD REST PART MICROSCOPE PART ILLUMINATION PART WORK TABLE PART RAIL COVER BREATH SHIELD INPUT POWER CABLE FOCUSING TEST ROD PROTECTING CAP CHIN REST PAPER SCREW DRIVER SPARE BULB USER MANUAL PACKING LIST Q UANTITY NOTE S 1 Fig 2 1 7 Ni i Fig 2 1 2 Gilras LLC 10 Version 1 0 2 2 Assembly procedure 1 Open the carton take out the tools like screw driver and spanner Check the setting on the voltage selector located on the bottom of the power box If it doesn t match with the input voltage slide it to the proper position with watch screw driver Take out the table unit check whether the power switch is in the proper position if not use the screw driver to correct it caution Open the fuse holder with screw driver and take out the fuse check and ensure that its rated value is corresponding to the mains voltage IN 1A It has been set to 220V 1A before leaving Before SLIT LAMP USER MANUAL Fig 2
5. 1 7 our factory Attention Set the input voltage and frequency of the instrument according to that of the mains attaching the worktable Fig 2 1 4 on to the power table please screw off four M6x20mm bolts with the spanner Fig 2 2 1 A Team 5 Lift the worktable to aim its screw hole at the assembly hole of the instrument table Fig 2 2 2 6 Put down the worktable with the power Gilras LLC 11 Version 1 0 SLIT LAMP USER MANUAL panel facing the operator refasten the bolt cover to the rail remove four screws securely with the spanner Fig 2 2 2 attached to the rail with the screw drive retighten the previously removed screws Fig 2 2 5 and 2 2 6 connect with the electrical table 7 Connect two white adapters under table board Turn on and press Up amp Down switch to check whether the power table isnormal Fig 2 2 3 Fig 2 2 6 10 Take out the binocular tubes of microscope part Fig 2 1 2 match the groove on the binocular tubes with the pin on the microscope body Fasten the fixing screw 8 Remove the four screws of B Team with on the body to the microscope the screw drive Fig 2 1 4 take out the ATTENATION Don t touch the objective head rest from carton Fig 2 1 1 ensure and eyepiece when assembling the four hole on head rest aim the screw hole of B team Fig 2 2 1 B team retighten the previously removed screw make head rest connect with work ta
6. 3 5 4 Replacing the fuse l Turn off the main power switch Fig 3 1 3 remove the power cable from the socket Fig 5 4 1 2 The fuse is inserted in the fuse box which has fuse mark Please rotate the fuse part out Fig 5 4 1 by pressing the fuse box with a screw or a coin One fuse is in use the other is in spare Please check them if the one in use is burnt please replace it with the spare one and then place both the two fuse parts into Rotate the original place spring piece and take out the bulb Gilras LLC 19 Version 1 0 SLIT LAMP USER MANUAL Remove the power cable Fig 5 4 1 Replace the fuse 3 The fuse specification F1AL250V Attention Please select the fuse of the same type specification and rate value 5 5 Consumables l F se LA 230V secreane ners dunesaceee l piece 2 Bulb 6V20W halogen bulb The life span of the bulb is 480 hours however it can still work out of the time span and the brightness of the bulb might be lower Gilras LLC 20 Version 1 0 SLIT LAMP USER MANUAL 6 Trouble shooting guide In case there is any trouble please check according to the following table for reference If it still cannot work please contact the authorized distributor The cable isn t connected correctly with the Connect the power cable power socket correctly l ae E Place the switch on T The main power switch is on O position E position The plug on the power box 1s l
7. IN GILRNS USER MANUAL SLIT LAMP MICROSCOPE Model GR 54 h x 4 le 6 f f i t a A Jii y By la Version 1 0 SLIT LAMP USER MANUAL Thank you for purchasing our slit lamp microscope The following is the description and specification of our product General description 7 This user manual elaborates on the relevant technical specification and operation notes of our slit lamp 7 Working principle A beam of light attached to the slit lamp projects to the patients eye which forms an optical section of the living tissue of the eye in this way the doctor can finish the observation and examination 7 Slit Lamp Microscopes are used to observe the disease of the anterior structures and tissue damage of eyes The specification of this slit lamp microscope Microscope Type Magnification change Eyepieces Angle between eyepieces Total magnification Ratio Pupillary adjustment Diopter adjustment Field of view Slit Illumination Base Slit width Slit length Aperture diameters Slit angle Slit inclination Filters Lamp Longitudinal movement Lateral movement Galilean Type Five Position revolving Drum 12 5X 13 6X 10X 16X 25X 40X 52mm 78mm 6D 40X 5 5mm 25X 8 5mm 16X 13 5mm 10X 22mm 6X 34 7mm Continuously variable from 0 to 14mm at 14mm slit becomes a circle Continuously variable from 1mm to 14m
8. ally the thermal safety filter can make the patients feel comfortable After using the other filters we should turn back to the thermal safety Fig 3 4 6 Gilras LLC 16 Version 1 0 SLIT LAMP USER MANUAL No Filter Heat absorbing filter ND filter Red free Cobalt Blue From left to right OOOO The no filter is used for proofreading for the manufacturer 3 5 Operation notes 1 In the course of the operation the operator should learn more about the contents of the user menu to master the structure and function of slit lamp microscope so as to carry out the right operation and diagnosis 2 In order to prevent unnecessary observations arising from the misuse of the judge operators should observe clearly the different locations in the knob corresponding to a different scale and different directional marks in the process of using the SLM 3 Operator should adjust the interpupillary distance and diopter correctly in the operating or which may lead a feeling of dizziness 4 Operator may have a feeling of dizziness in long time observing so please adjust observing time according to personal habit 5 There will be a branch of crack ray irradiation in patients eyes when they receiving SLM diagnosis So if the light is too dark it will affect the observing effect Conversely if the light is too bright in a long time exposure patients vision might be affected If patients feel uncomfortable plea
9. ble Fig 2 2 4 9 Take out the slit lamp part Fig 2 1 3 put it on the rails of the table board check whether the wheels can be rolled steadily on the rails Fig 2 2 5 place the rail 11 Remove the breath shield fixation screw Gilras LLC 12 Version 1 0 from the microscope arm pass the removed screw though the hole of the breath shield and then screw it into the arm again Fig 2 2 8 Breath Shield TOP WO AK 12 Insert the plug on the top of the headrest part Fig 2 1 1 into the socked of the lamp cap Fig 2 1 3 on the illumination part 13 Connect the plug below the headrest part with the corresponding output socket of the power box 14 Collect tools and spare parts put them into the drawer under right side of table board 2 3 Checking procedure after assembling 15 This instrument supplies a 3 wire cable Please select a proper power socket as matched Ensure that the instrument is grounded well 16 When the main power switch of the power box is placed at I it turns on and O for turn off The main power switch should be set at the O position before connecting the input cable with the power socket 17 Turn on the main power switch and the pilot lamp will be lighted Open the light control knob to examine the brightness The power supply signal will turn bright when power is connected Fig 3 1 3 18 Put on focus test rod Fig 2 1 7 Adjust the slit width control knob a
10. during the operation Fig 5 2 1 8 Please cover the main shaft hole with the b If the knob is too loose adjust the screw clockwise as fig 5 2 1 8 shows If the knob is too tight rotate the screw anticlockwise till the knob is protection cap lest the instrument would be damaged Take off the cap when the focus test rod needs to be assembled Fig 5 1 1 comfortable to use Gilras LLC 18 Version 1 0 SLIT LAMP USER MANUAL 5 2 2 Adjusting the inclination of the illumination part Fig 5 3 2 If the inclination mechanism of the illumination part is too loose fasten the screw on both sides of the pivot point with the screw driver Fig 5 2 2 1 Fig 5 3 3 5 3 Replacing the illumination 3 Take out the old lamp part bulb Fig 5 3 2 replace it with a new one The 1 Turn the main power switch off groove in the bulb fixation disc should be Fig 3 1 3 aligned with the flange of the lamp base 2 Pull out the plug attached to the lamp otherwise the illumination may be uneven house remove out the fixation knob Pull up Fig 5 3 3 Fix the lamp part with three the lamp cap from the illumination unit knobs Fig 5 3 1 amp 5 3 2 4 Place the lamp cap in the original position fix the lamp cap with the knob insert the connecting plug 5 Turn on the main power switch and Remove the check whether the new bulb is lamp cap illuminating Check the spot to make sure it round and no false light Fig 3 1
11. ilable at full aperture 14 10 5 32 1 0 2 Dia Respectively and one continuously changing aperture With a slit image the slit height can be changed continuously from 1 to 14mm which is indicated though the display window Fig 3 4 2 Aperture knob Swing the aperture and slit height control Rotating the slit image knob horizontally to revolve the slit image at any angle in the vertical or horizontal direction The angle of image rotation is indicated by the rotation angle scale with small division for 5 and big division for 10 Fig 3 4 3 Decentering the illumination light Loosen the centering knob and swing the slit width control knob back and forth so the light spot moves away from the center of the microscope vision field It is mainly used to examine the eyes by indirect retro illumination Fasten the centering knob and the slit light will return to the center of the microscope vision field Fig 3 4 4 5 6 SLIT LAMP USER MANUAL Oblique illumination Oblique illumination is used for sectional or fundus examination by use of a contact lens Press down the inclination lever so that the illumination part may incline to 20 illumination part may touch the patient s 5 of each division Since the head operate carefully Fig 3 4 5 Inclination lever Filter selection By shifting the selection lever four different filters can be inserted into the illumination pathway Usu
12. m O14mm 010mm 5mm H3mmW2mm lmm 0 2mm 0 180 4 step 5 10 15 20 Heat absorbing filter ND filter Red free Cobalt Blue 6V 20W Halogen Lamp 90mm 100mm Gilras LLC 2 Version 1 0 Fine Base movement Vertical movement Chin Rest Vertical movement Fixation Target Power Input voltage Input frequency Power Consumption Output voltage Light Fixation Dimension amp Weight Dimension Gross weight Net weight Working environment Temperature Relative humidity Air pressure Storing environment Temperature Relative humidity Air pressure Transporting environment Temperature Relative humidity Air pressure SLIT LAMP USER MANUAL 15mm 30mm 0mm Red LED 220V 110V 10 50Hz 60Hz 30VA max 6V 3V 740mm x 450mm x 500mm 25Kg 24Kg 5 C 40 C lt 80 800hpa 1060hpa 40 C 55 C lt 93 700hpa 1060hpa 40 C 55 C lt 93 700hpa 1060hpa Gilras LLC Version 1 0 SLIT LAMP USER MANUAL General Requirements for Safety Please read carefully the following precautions to avoid unexpected personal injury as well as the product being damaged and other possible dangers Precautions 1 In case there is any trouble please first refer to the trouble shooting guide If it still can t work please contact the authorized distributor or our Repair Department 2 Do not use this instrument in the environment prone to fire and blast or where there i
13. nd there should be facula on the black flat surface SLIT LAMP USER MANUAL of focus test rod and the brightness should change 19 Check the fixation target device to confirm it is lighted Ensure it can be normally lighted Fig 3 2 1 20 Check whether all the moveable parts such as aperture and slit height control knob Fig 2 3 2 filter selection lever joy stick Fig 2 3 4 and magnification changer lever Fig 2 3 3 etc could be operated freely Fig 2 3 3 Joystick 21 Turn on the light knob Fig 3 1 3 the light should be from dark to bright Gilras LLC 13 Version 1 0 22 After examination turn off the main power and cover the instrument with the dust proof cover 3 Operation procedures 3 1 Diopter compensation and Pupil Distance adjustment DUse of the focusing test rod The rod is supplied as one of standard accessories for confirming the microscope s accurate adjustment Insert 1t into the main shaft hole with the black flat surface facing the objective lens 1 e the direction of the operator Fig 3 1 1 amp 3 1 2 ATTENTION After the adjustment take out the rod Brightness adjustment Switch on the main power switch and set the brightness control switch Fig 3 1 3 at central part Turn the slit width control knob Fig 2 3 1 to make the slit width to be 2 3mm Dark Bright Brightness control switch Fig 3 1 3 SLIT LAMP USER MANUAL 8 Adjustment of Di
14. o 15 Voltage selector work under appropriate voltage luminance 16 1 The marks of light dimmer Gilras LLC 5 Version 1 0 SLIT LAMP USER MANUAL Contents 1 NOMENCLATURE iaa 7 2 ASS SHLA sO 61 Bip ioe cent tte peer eve Re RIO DRA RT DT OST Hee re ORE SRE OR ROR EAR nen Da mE OO RE OR SACRE SR OMS OPO mE OTD ROR RO CRORE PER Ere 10 21 CHECK rta EN E A E AA A E A EN 10 D2 PASSE VDI PROC ED dd o o E E o 11 2 3 CHECKING PROCEDURE AFTER ASSEMBLING scccsscccsccescccscccncccscccusccusccesccesscesscesccessceusceesecusccsecesecesscesseessensseasecs 13 3 OPERATION PROCEDURES 14 3 1 DIOPTER COMPENSATION AND PUPIL DISTANCE ADJUSTMENT cccscccesccescccscccsccescccncccscccesecsccsccesccesecesscesscessens 14 3 2 PATIENT POSITION AND USE OF FIXATION TARGE diodos 15 3 3 BASE SINE e E E E E EE EEE S E S EEE EE E E E EEE E EE TC EEEE 15 3 4 OPERATION OF TE EUMINATION UN T it A A E A E E 15 3 5 DAS va pea gases GE aE GOSS SSS NG se SSA Ses Se Se Sates Sse Sos ee 17 4 CLEANING AND DISINEE C DION siii aia 17 4 1 AUS A TN 17 NS E A e TO 17 Nl O CCI CSCUV OLE AAA estudecnebeoaadousguaaceseonness 18 5 PROTECTING AND MAINTAINING u ccccccccccccccccccscccccccccccccccccccccccccsccccccccccccccccccccccccccccccccccccecccccccccccscccccees 18 5 1 LS RS Sot TTR APE REET NO NN AO 18 52 INA TTBS Gc aca A a a aaa aa a a 18 5 3 REPLACING THE ILLUMINATION BULB ia 19 5 4 REPBACINO TAE PUSE EEE N T ao co dea ao des 19 5 5 CON e EO 20 6
15. oosen Insert the plug firmly The plug on the lamp cap is loosen Insert the plug firmly The bulb has burnt out Change the bulb Change the fuse Assemble the bulb properly The filter lever is in the middle position or in the Set the filter lever to the position of gray filter correct position the adjustment No illumination The bulb is not assembled properly the brightness adjustment knob is at min Set the voltage selector Voltage selector is wrongly set correctly Change the reflecting Slit is too dark The coat of the reflecting mirror is oxidized mirror Clean the surface with the brush Set the voltage selector Voltage selector id wrongly set The edo comply wit epica Too much dust on the reflecting surface Replace it with a suitable The fuse doesn t comply with the specification Hise Slt width closes Adjust the tightness of l The slit width control knob is too loose automatically the control knob Fixation bulb is off The output plug is loose oe the output plug irmly Gilras LLC 21 Version 1 0 SLIT LAMP USER MANUAL Appendix A Electronic Circle Drawing Sl Fl O o 220 110 Brightness control knob Appendix B Illustration of the board of power box 1 Fuse box 2 Power socket 3 110V 220V voltage selector 4 Fixation lamp socket 5 Illumination lamp socket 6 Brightness control knob socket Assembly of power supply There
16. opter compensation The focus of the microscope is calibrated according to the emmetropia If the operator is an ametropia he should adjust the eyepiece diopter Fig 3 1 4 Suggest adjusting the diopter as following procedures First rotate the diopter adjustment ring counter clockwise until the end Fig 3 1 4 Second rotate the ring clockwise until a fine slit image appears on the focusing text rod At this time it is also the clearest observation of the reticule in the eyepiece Adjust another eyepiece in the same way Record the diopter value on each eyepiece for future reference Diopter adjustment ring 4 Interpupillary distance adjustment Separate the prism box of the microscope with both hands to adjust the P D until both eyes could see the same image on the focusing test rod through the eyepieces and at the same time a stereo vision will be obtained When adjusting be sure that the eyepieces are at the same level Fig 3 1 5 Gilras LLC 14 Version 1 0 3 2 Patient position and use of 1 2 fixation target Position of the patient s head Place the patient s chin on the chin rest with the forehead against the forehead rest belt Adjust the adjustment knob until the patients can thus align with the horizontal mark Fig 3 2 1 chin rest elevation below the chin rest Use of the fixation target For fixing the patient s sight just make him look at the fixation targe
17. s much dust and with high temperature Use it in room and simultaneously be careful to keep it clean and dry 3 Check that all the wires are correctly and firmly connected before using Ensure that the instrument is well grounded 4 Please pay attention to all the ratings of the electrical connecting terminal 5 Turn off the main power first before replacing the main bulb flash lamp and fuse 6 When replacing the power cable please use the power cable in accordance with the notes in the instruction manual 7 Don t touch the surface of the lens and prism with hand or hard objects 8 To prevent the instrument from falling down to floor it should be placed on the floor where the inclination angle is less than 10 9 Read carefully the safety and other signals on this machine in order to use the product safely Gilras LLC 4 Version 1 0 SLIT LAMP USER MANUAL THE SAFETY MARKS PICTURES USED IN THIS INSTRUMENT A a 2008 The slit lamp is type I medical using equipment Type B English form of B type WEEE mark Please deal with the waste disposal 5 R produced by the machine following relevant laws gt and regulations At the back of power supply box indicate outlet of 11 Output the power At the back of power supply box indicate input of 12 Input the power Fuse FIAL250V Rated value and current value At the front of power supply box use with on and 14 Power off Change input voltage to adjust the equipment t
18. se tell the operator or take medical treatment Therefore please try to avoid prolonged exposure of patients eyes in the bright light 4 Cleaning and disinfection A Attention The replaced waste materials should be treated as industrial rubbish 4 1 Cleaning 4 1 1 Cleaning way Cleaning the lens and reflecting mirror If any dust stick on the lenses or reflecting mirror wipe it off with soft cotton dipped with absolute alcohol Fig 4 1 1 iw Don t wipe with hands or hard project or any corrosive detergent lest that the surface should be damaged 2 Cleaning the tie plate rails and shaft If the slide plate rails and shaft are dirty the vertical and horizontal movement will be unsteady Wipe them with clean soft cloth Fig 4 1 2 a 3 Cleaning and sterilizing the plastic parts Clean the plastic parts such as chin rest bracket forehead rest belt with soft cloth dipped with soluble detergent or water then sterilize with medicinal alcohol Attention corrosive detergent lest that the surface Don t wipe with any Gilras LLC 17 Version 1 0 SLIT LAMP USER MANUAL should be damaged Fig 3 2 1 Protection 4 1 2 Cleaning circle 1 Clean the eyepieces objective lens and refractor Cycle suggested once every two months EXPLODED The lenses are plated with a reflection 5 2 Maintaining reducing coating and reflective coating on i
19. t with the eye not to be examined Move the lamp bar to change fixing position so as to achieve the correct lamp position 3 3 Base operation 1 2 Horizontal rough adjustment Keep the joystick erect and move the base to make the microscope move on the horizontal surface to aim at the object appropriately Fig 3 3 1 Vertical adjustment Rotate the the microscope s height until it aligns with the joystick to adjust 3 SLIT LAMP USER MANUAL target Turn the joystick clockwise to raise the microscope and counter clockwise to lower it Fig 3 3 1 Horizontal Fine adjustment Tilt the joystick to make the microscope move slightly on the horizontal surface While watching though the eyepieces tilt the joystick to aim accurately at the object for a fine image Fig 3 3 1 4 Locking the base When finishing the adjustment fasten the base locking screw to lock the base to prevent it from sliding Fig 3 3 2 Fig 3 3 2 3 4 Operation of illumination unit Changing the slit width 1 Turn the slit width control knob Fig 2 3 1 and the slit width will be changed from Omm to 14mm The slit becomes a circle at the 14mm size The width value is indicated approximately by the scale on the knob Fig 3 4 1 Gilras LLC 15 Version 1 0 2 3 4 Changing the aperture and slit height Turn the aperture and slit height control knob and 7 different circular beams of light are ava
20. ts surface Although the coating is 5 2 1 Adjust the slit width control knob hard enough too frequent wiping will 1 If the slit width control knob is too loose weaken it which leads to a bad the slit width may be out of control Fasten the observing optical effect Two month is a locking screw on right side clockwise with a recommendation if there is lots of dust hexagon type screw driver on the lens please wipe it immediately 2 Cleaning the slide plate rails and shaft Cycle suggested once a month These parts won t get dirty in a clean environment such as hospital in one year However we suggest you clean them once every 6 months so that you can get a much better movement effect 3 Cleaning the plastic parts Cycle suggested once a day These two parts contact with the patients Locking screw on the right knob directly so please clean them timely Please replace a new and clean chin rest paper for each patient e 4 Cleaning the whole machine 2 Follow the steps listed below to do the Cycle suggested once every two months adjustment a Rotate the locking screw with a hexagon 5 Protecting and maintaining type screw driver Correct and periodical protecting and maintaining can prolong the service life of the slit lamp The suggested maintaining circle is two months 5 1 Protecting There are always dusts and physiological salt solution dropping into the main shaft hole of the illumination ram
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