Notes to accompany lecture to 2nd year City University undergraduates
Dr Simon Barnard PhD BSc FCOptom FAAO DCLP
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Table of Contents
§Introduction
§Key objective
§Uses of slit lamp
§Routine observation of ocular adnexia
§Methods of illumination
§Investigation of posterior segment
§Advantages of BIO
§Monitoring signs and symptoms
§Further "special investigations"
§Recommended reading
§
The ability to carry out expert slit lamp microscopy can only be attained by extensive practise of the techniques in conjunction with:
To introduce the practitioner to the various clinical uses for which the slit lamp biomicroscope is employed.
The slit lamp biomicroscope is used extensively during optometric/ophthalmological procedures:
The instrument has a specific role to play in the field of contact lens practise:
The slit lamp is used to examine the "external eye:
Structure |
Just a few examples of abnormalities diagnosed with slit lamp microscope |
Lids |
Meibonitis, blepharitis, |
Lashes |
Pediculosis, distichiasis |
Tears |
Fast "invasive tear break up time" |
Conjunctiva |
Conjunctivitis |
Cornea |
Infiltrates, pannus |
Pupil |
Anomalous pupillary responses |
Anterior segment structures |
Iris thinning |
Anterior chamber angle |
Narrow anterior chamber angle |
Whilst methods of illumination have been discussed in a previous lecture (see lecture by Mrs J Birch) a brief review is listed here:
Direct, indirect, direct retro-, indirect retro-,
sclerotic scatter, specular reflection,
trans-illuminance.
You are reminded that it is important not just to consider the method of illumination but how each helps you see ocular structures and tissue changes.
For example:
The following lenses have been/or are used in conjunction with the slit lamp biomicroscope:
Hruby lens (-55D)
El Bayadi lens (+ve sph)
Other high plus aspheric lenses e.g., Volk lenses ( various +)
Goldman and other design contact lenses
e.g., Volk aspheric biconvex lens (+60, +78, +90 and +138D)
Examples of symptom/signs for which the slit lamp is invaluable include:
Always instil fluorescein when investigating the above signs/symptoms.
There are number of other investigative techniques that utilise the slit lamp. Some of these utilise attachments or additional equipment used in conjunction with the slit lamp. Examples of these include
Fingeret M, Casser L, Woodcombe, HT (1990) Atlas of Primary Eyecare Procedures, Appleton & Lange, Norwalk