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7. Measurement procedure
7.2 Preparing the patient
• Use an appropriate topical anaesthetic to numb the cornea.
• Place a strip of fluorescein-soaked paper near the outer
canthus in the lower conjunctival sac. After a few seconds the
lacrimal fluid will be colored and the paper may be removed.
When using drops, we recommend a 0.5% solution of
fluorescein sodium. If using a 1% or 2% solution, use a glass
rod to introduce a small quantity of liquid into the
conjunctival sac.
• Seat the patient at the Slit Lamp and place his chin on the
chinrest and ensure the forehead touches the forehead rest.
• Adjust the chinrest height so that the patients eye is at the
correct height (most Slit lamps have a marker on the chinrest
pole for correct height adjustment).
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