Slit lamp frequently asked questions

You will find below a comprehensive list of questions on topics such as; where to find slit lamp operation instructions, where to buy replacement parts and what slit lamp educational resources are available. 

If you have a query which is not answered on this page then please call our customer services team on 01279 883720 or you can contact us via the button below. 

Expand the questions below to find out more


To find details about all of the Haag-Streit slit lamp models, please visit our slit lamps website pages. The main differences lie in the magnification settings and accessories. For more detailed information, please contact our customer services team on 01279 883720 or email sales.uk@haag-streit.com.


Information on the range of slit lamp tables can be found on the HS-UK website here. Models include the HSM 600 tables as well as the DOMS refraction units. For information on the dimensions of the tables please contact our customer services team on 01279 883720 or email sales.uk@haag-streit.com.


The bulb needed for your slit lamp will depend on the model. If you have a BQ 900, BP 900 or BM 900 you will need either an LED, Tungsten or Halogen bulb. The Tungsten bulb is available to purchase on the HS-UK eshop and is also suitable for older models of the BX 900. If you require an LED or Halogen bulb, please contact our customer services team on 01279 883720 or email sales.uk@haag-streit.com. If you have a BI 900 then you will need an LED bulb. BD 900 and BC 900 slit lamps require Halogen bulbs which can be found on the HS-UK eshop.


It is possible to purchase a complete replacement for your head and chin rest. If you purely need to replace the plastic headband strap, this is also possible (part number 5702037). For either product, please contact the customer services team on 01279 883720 or email sales.uk@haag-streit.com.


All Haag-Streit slit lamps are available with wheelchair accessible tables. The Base Design twin lift table can be used for bariatric wheelchairs, without removing the foot rests.


Information on how to operate your Haag-Streit slit lamp can be found on the HS-UK website. Follow the links to your model from the overview page here. The ‘Instructions For Use’ can be found and downloaded from the bottom of the relevant slit lamp product page.

For hands-on guidance on how to operate your slit lamp, we recommend you attend one of our educational courses. Information on these can be found at Haag-Streit Academy.


The cost of a Haag-Streit slit lamp will vary depending on which model you choose and which accessories you may need to accompany it.  For advice on which model may be most suitable for you and a full quotation, please contact our customer services team on 01279 883720 or email sales.uk@haag-streit.com.


Haag-Streit slit lamps can be on for as long as you need them. If you have a Tungsten bulb then this will eventually expire and will need replacing (for a replacement bulb, visit the HS-UK eshop).


The new BI 900 model has the same magnification steps as the BM 900 and additionally offers the opportunity to upgrade or include anterior segment imaging.


Haag-Streit Academy runs a variety of slit lamp courses to suit everyone, from beginners to more experienced users. For information on the current event calendar, please visit Haag-Streit Academy or email the Haag-Streit Academy Team at academy.uk@haag-streit.com.

Haag-Streit Academy also offers a free slit lamp elearning course which is accessible via the Haag-Streit Academy elearning portal. To access the course, visit https://hsuk.co/SlitLampPortal.


Haag-Streit Academy runs a variety of slit lamp courses, including a more advanced slit lamp imaging course. For course information, dates and availability, please visit Haag-Streit Academy or email the Haag-Streit Academy Team at academy.uk@haag-streit.com.


A variety of slit lamp accessories are available on the HS-UK eshop, including bulbs, dust covers and chin rest papers. If you cannot find what you are looking for on the website, please contact our customer services team 01279 01279 883720 or email sales.uk@haag-streit.com.


The thinnest beam on a slit lamp is zero. It is a continuous width, but using a fixed aperture setting, it is 0.2mm.


You can add imaging to the BQ 900, BP 900 and BI 900 slit lamps. Haag-Streit offers the IM 910 and IM 600 imaging units for anterior examinations of the eye.


The HS-UK Service Division is the only Haag-Streit authorised slit lamp service agent in the UK. We carry out an annual preventative maintenance visit for all our contract customers, as well as ad-hoc services for a one-off fee. A fully-qualified HS-UK Field Service Engineer will visit your premises and carry out an internal and external inspection, lubricate your slit lamps using Haag-Streit approved lubricants, perform a full optical alignment check and adjustment, and provide a detailed service report. Click here to find out more about the HS-UK Service Division and taking out a service contract.