Management of Superior Pellucid Marginal Degeneration With a Single Intracorneal Ring Segment Using Femtosecond Laser

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A 26-year-old man with superior pellucid marginal corneal degeneration associated with poor visual acuity due to irregular astigmatism was treated with single-segment intracorneal ring insertion.


Preoperatively the patient's uncorrected visual acuity (UCVA) was 0.05, best spectacle-corrected visual acuity (BSCVA) was 0.15, and manifest refraction was −4.50 × 85 in the left eye. The flattest meridian (K1) measured was 38.50 × 90 and the steepest meridian (K2) was 51.10 × 30.


Three months postoperatively, UCVA was 0.15, BSCVA was 0.4, and manifest refraction was −2.50 × 90.


The use of single Intacs with femtosecond laser to treat superior pellucid marginal corneal degeneration improved visual acuity.

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