A 41-year-old woman presented to the ophthalmology clinic with vision that had been deteriorating during the preceding 20 years. Her subjective refraction showed that a hyperopic shift had occurred since her current corrective lenses had been prescribed. Her best-corrected visual acuity was 20/25 in both eyes. A slit-lamp examination was performed, with the following corneal appearance. What is the diagnosis?
A) Herpes simplex keratitis
B) Trauma related corneal injury
C) Laser-assisted in situ keratomileusis
D) Radial keratotomy
E) Vitamin A deficiency
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