If a patient has a painful eye, is it from the cornea?
By using a drop of fluorescein you can identify defects in the normal ocular surface, for example
- Corneal abrasion
- Dendritic Ulcer
- Subtarsal foreign body (causing fine linear abrasions)
- Dry eye (speckled appearance)
- Examine without fluorescein first
- Use a drop of fluorescein. (as little as possible)
- Use a blue light where possible, (better than the green light)
The following images show the use of fluoroscein, the first shows a linear abrasion where a person has walked into a bush. The second shows a gentleman with a red left eye, who has a history of cold sores. Fluoroscein examination confirms a dendritic ulcer.