They develop gradually and almost imperceptibly, but can worsen quickly within a few weeks.
Patients do not necessarily feel pain, burning or itching in the eyes, or any discomfort if the changes are modest. The genes usually start on one eye, but over time, both eyes will be affected. For example,
- reduced vision, both at a distance and close by
- double vision, which does not disappear when you cover one eye
- problems with glare, especially if suddenly exposed to bright light...