Symptoms that suggest corneal involvement (eg, rather than simple conjunctivitis) include unilateral involvement, pain (foreign body sensation and ache—not just a gritty sensation), particularly with exposure to light (photophobia), and decreased visual acuity.
Corneal disorders include the following:
Evaluation of the cornea requires fluorescein staining and, when available, slit lamp examination Slit-lamp examination The eye can be examined with routine equipment, including a standard ophthalmoscope; thorough examination requires special equipment and evaluation by an ophthalmologist. History includes location... read more , and sometimes microbial studies. Patients with symptoms or evidence of keratitis should be referred to an ophthalmologist.