Near vision contrast sensitivity after photorefractive keratectomy

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Abstract
Background: To evaluate near vision contrast sensitivity as a measure of visual performance after photorefractive keratectomy (PRK). Setting: LSU Eye Center, New Orleans, Louisiana. Methods: Using Holladay Contrast Acuity Test cards, near (reading) vision for five levels of contrast sensitivity was evaluated in a cross section of 53 eyes of 31 patients 25 to 732 days after PRK. Twenty-four normal eyes of 22 myopic patients served as controls. Results: Near contrast sensitivity decreased at all tested contrast levels for approximately 7 months after PRK and then returned to baseline. This phenomenon paralleled the fluctuation in best corrected distance Snellen acuity. Conclusions: These preliminary results indicate that Snellen visual acuity and near contrast sensitivity returned to baseline within 1 year after PRK.