SIMAR J. SINGH 1, WILLIAM B. TRATTLER 1,2, GABRIELA PEREZ 2, DAVID T. LIN 3 1 Herbert Wertheim...
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Transcript of SIMAR J. SINGH 1, WILLIAM B. TRATTLER 1,2, GABRIELA PEREZ 2, DAVID T. LIN 3 1 Herbert Wertheim...
SIMAR J. SINGH1, WILLIAM B. TRATTLER1,2, GABRIELA PEREZ2, DAVID T. LIN3
1Herbert Wertheim College of Medicine, Florida International University, Miami FL2Center for Excellence in Eye Care, Miami FL3University of British Columbia, Vancouver BC
Dr. Trattler has received funding for research, consulting and/or speaking from: CXLUSA
Purpose and MethodsPurpose: To report the results of bilateral CXL followed by
topography- guided PRK for a commercial airline pilot who required excellent uncorrected visual acuity to continue with his occupation.
Methods:A 33-year-old African American male commercial airline
pilot with advanced bilateral keratoconus & no previous ocular surgery was treated with epithelial-off CXL followed 4 months later by topography-guided PRK with the Allegretto laser platform. A comparison of UCVA, BCVA, pentacams, and placido-disk topographies were gathered pre & post CXL treatment and & post PRK.
ResultsOD Pre Op Pre PRK/ Post
CXLLast Visit/
Post CXL and PRK
UCVA 200 200 40
BCVA 50 40 30
Refraction -7.50+1.50x0
80
-8.00+0.75x105 -3.75+0.50x55
OS Pre Op Pre PRK/ Post CXL
Last Visit/Post CXL and
PRK
UCVA 400 50 25
BCVA 30 30 25
Refraction -5.75+1.50x1
00
-5.75+0.75x080 -2.50+0.75x120
Difference Map OD: Pre-Op to Post-CXL/ Pre-PRK
Post-CXLPre-Op
Difference Map
4 D Flatter
Difference Map OD: Pre-Op to Last Visit (Post-CXL and Post-PRK)
Difference Map
Pre-Op Post-CXL/ Post-PRK
11 D Flatter
ConclusionsThis case illustrates the potential for marked
improvement in UCVA and BCVA in patients who have undergone CXL followed by topography-guided PRK. Patients with advanced keratoconus may experience greater improvement in visual acuity and experience a greater improvement in quality of vision with CXL followed by PRK when compared to CXL alone.
KEYWORDS: Keratoconus, Corneal Crosslinking, Photorefractive keratectomy (PRK).