poster 13: visual stability with gas-permeable lenses from dehiscence repair of radial keratotomy...

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review of our post-LASIK ectasia patients treated with INTACS in 1 eye and subsequently referred for contact lens fitting between June 2002 and October 2005. The purpose of this study was to see if contact lenses were feasible for visual correction. Methods: The endpoints were uncorrected visual acuity (UCVA), amount of cylinder on manifest refraction, best spectacle-corrected visual acuity (BSCVA), best contact lens-corrected visual acuity (BCLVA), number of contact lenses ordered to complete the fitting, contact lens design, base curve of the contact lens, and the spherical equivalent lens power. Six patients meeting these selection criteria were found through the chart review. Mean UCVA (log- MAR) was 1.03 0.14 (20/215 in Snellen), mean BSCVA (logMAR) was 0.23 0.12 (20/34 in Snellen), and the mean BCLVA (logMAR) was 0.11 0.07 (20/26 in Snellen). Mean manifest cylinder (measured in diopters) was 4.58 1.16. Results: Vision in post-LASIK ectasia patients treated with INTACS improved by approximately one line with contact lenses compared with spectacles; the mean number of lenses ordered to complete the fitting was 2.5 0.83. Two eyes were fit in disposable soft toric lenses, 1 eye was fit in a daily wear toric lens, 2 eyes were fit in a hybrid contact lens, and 1 eye was fit in a reverse geometry soft contact lens. The mean spherical equivalent lens power was 1.20 2.79 diopters and base curve of the contact lenses ranged from 8.3 to 9.1. Conclusion: Contact lenses fit on post-INTACS patients treated for ectasia after LASIK can be used successfully for visual correction. Poster 13 Visual Stability with Gas-permeable Lenses from Dehiscence Repair of Radial Keratotomy Incisions Suzanne Tran, O.D., and Kent Wellish, M.D., Vision Source, 6640 Rumba Court, Las Vegas, Nevada 89139 Background: Corneal wound dehiscence following RK has been reported in cases involving blunt trauma or intraocular procedures. This case describes the management of gas- permeable (GP) lenses for visual stability following dehis- cence repair from astigmatic keratotomy. Case Report: A 60-year-old woman with a history of high myopia OU underwent radial keratotomy OU 11 years ago. She was referred to the Wellish Vision Institute for painful corneal erosion, with symptoms of light sensitivity and tearing causing visual deterioration. Biomicroscopy re- vealed 16 RK incisions, with dehiscence of AK incisions at the 8 o’clock and 4 o’clock positions O.D., and 8 RK incisions O.S. Her treatment regimen was Muro ung q.h.s. OU, Muro 128% drops q.i.d. OU, and Zymar q.i.d. O.D. The dehiscence was evidenced by fluorecein uptake in the incision bed. The lens was clear OU. Her BVA was 4.50 3.75 120 (20/25) O.D. and 0.00 0.50 120 (20/25) O.S. prior to suture repair. Methods: After months of unsuccessful dry eye therapy and visual fluctuation, the patient proceeded with suture repair O.D. The wound dehiscence was closed with interrupted 11-0 mersilene sutures. One year postoperatively, the pa- tient was referred to Vision Source to correct irregular astigmatism. Her BVA was 2.00 2.75 037 (20/100) and 0.75 1.75 138 (20/20). The simulated K readings were 47.62/39.00@066 O.D. and 44.12/42.75@136 O.S. Results: She was successfully fitted in a reverse geometry GP O.D. and large-diameter spherical lens O.S. The O.D. lens exhibited mild temporal clearance over the suture repair and mild areas of mid-peripheral bearing with aver- age edge clearance. The O.S. lens showed areas of mild central pooling, mid-peripheral bearing, and maximum edge clearance. The final lenses were: BC 8.6/2.00/ 7.60/1.0 /OZ 7.0/OAD 10.5 (20/20-3) O.D. and BC 7.6/1.25/OZ 8.0/OAD 10.5 (20/25) O.S. Conclusion: Gas-permeable lenses can rehabilitate vision post-dehiscence repair for an irregular cornea. This patient’s topography, orbscan, and photographs will be illustrated. Poster 14 Pseudo-accommodation with Monofocal Intraocular Lenses Jennifer Tam, O.D., Family Vision Care, 4310 Genesee Avenue, Suite 101, San Diego, California 92117 Background: Cataract is one of the leading causes of blind- ness in the world. Genetic causes are implicated in half of all congenital and developmental cataracts. Typically, in- fants and children undergo cataract extraction to further promote visual development and avoid visual deprivation. Some patients remain aphakic or undergo intraocular lens implantation. In the case of pseudophakic patients, they may experience a phenomenon known as pseudo-accommoda- tion, that allows the patient to obtain comfortable vision at distance, intermediate, and near without lens correction. Case Report: A 7-year-old boy was brought to the UC Berkeley Eye Center Binocular Vision Clinic with concerns of difficulties in school, especially in the areas of reversals, writing, and math, but excelled in reading. General health was remarkable for asthma. Ocular health was remarkable for bilateral congenital lamellar cataracts, which had been extracted in August and September 2000, and monofocal intraocular lenses (AcrySof MA60BM) were implanted in both eyes. The patient’s father was also noted to have a history of bilateral lamellar cataracts as a child and is currently aphakic. Best-corrected visual acuity was 20/30 monocularly at distance and 20/25 monocularly at near. Refraction showed mild myopia in both eyes and mild against-the-rule astigmatism in the right eye. Binocular testing revealed stereopsis, true fusion, and absence of strabismus. On accommodative testing at multiple visits, the patient’s near point of accommodation was 10 diopters with the right eye and 2 diopters with the left eye. Anterior segment examination was remarkable for clear, well-cen- 271 Poster Presentations

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review of our post-LASIK ectasia patients treated withINTACS in 1 eye and subsequently referred for contact lensfitting between June 2002 and October 2005. The purpose ofthis study was to see if contact lenses were feasible forvisual correction.Methods: The endpoints were uncorrected visual acuity(UCVA), amount of cylinder on manifest refraction, bestspectacle-corrected visual acuity (BSCVA), best contactlens-corrected visual acuity (BCLVA), number of contactlenses ordered to complete the fitting, contact lens design,base curve of the contact lens, and the spherical equivalentlens power. Six patients meeting these selection criteriawere found through the chart review. Mean UCVA (log-MAR) was 1.03 � 0.14 (20/215 in Snellen), mean BSCVA(logMAR) was 0.23 � 0.12 (20/34 in Snellen), and themean BCLVA (logMAR) was 0.11 � 0.07 (20/26 inSnellen). Mean manifest cylinder (measured in diopters)was 4.58 � 1.16.Results: Vision in post-LASIK ectasia patients treated withINTACS improved by approximately one line with contactlenses compared with spectacles; the mean number of lensesordered to complete the fitting was 2.5 � 0.83. Two eyeswere fit in disposable soft toric lenses, 1 eye was fit in adaily wear toric lens, 2 eyes were fit in a hybrid contact lens,and 1 eye was fit in a reverse geometry soft contact lens.The mean spherical equivalent lens power was �1.20 �2.79 diopters and base curve of the contact lenses rangedfrom 8.3 to 9.1.Conclusion: Contact lenses fit on post-INTACS patientstreated for ectasia after LASIK can be used successfully forvisual correction.

Poster 13

Visual Stability with Gas-permeable Lenses fromDehiscence Repair of Radial Keratotomy IncisionsSuzanne Tran, O.D., and Kent Wellish, M.D., VisionSource, 6640 Rumba Court, Las Vegas, Nevada 89139

Background: Corneal wound dehiscence following RK hasbeen reported in cases involving blunt trauma or intraocularprocedures. This case describes the management of gas-permeable (GP) lenses for visual stability following dehis-cence repair from astigmatic keratotomy.Case Report: A 60-year-old woman with a history of highmyopia OU underwent radial keratotomy OU 11 years ago.She was referred to the Wellish Vision Institute for painfulcorneal erosion, with symptoms of light sensitivity andtearing causing visual deterioration. Biomicroscopy re-vealed 16 RK incisions, with dehiscence of AK incisions atthe 8 o’clock and 4 o’clock positions O.D., and 8 RKincisions O.S. Her treatment regimen was Muro ung q.h.s.OU, Muro 128% drops q.i.d. OU, and Zymar q.i.d. O.D.The dehiscence was evidenced by fluorecein uptake in theincision bed. The lens was clear OU. Her BVA was �4.50�3.75 �120 (20/25) O.D. and �0.00 �0.50 �120 (20/25)O.S. prior to suture repair.

Methods: After months of unsuccessful dry eye therapy andvisual fluctuation, the patient proceeded with suture repairO.D. The wound dehiscence was closed with interrupted11-0 mersilene sutures. One year postoperatively, the pa-tient was referred to Vision Source to correct irregularastigmatism. Her BVA was �2.00 �2.75 �037 (20/100)and �0.75 �1.75 �138 (20/20). The simulated K readingswere 47.62/39.00@066 O.D. and 44.12/42.75@136 O.S.Results: She was successfully fitted in a reverse geometryGP O.D. and large-diameter spherical lens O.S. The O.D.lens exhibited mild temporal clearance over the suturerepair and mild areas of mid-peripheral bearing with aver-age edge clearance. The O.S. lens showed areas of mildcentral pooling, mid-peripheral bearing, and maximum edgeclearance. The final lenses were: BC 8.6/�2.00/ 7.60/1.0/OZ 7.0/OAD 10.5 (20/20-3) O.D. and BC 7.6/�1.25/OZ8.0/OAD 10.5 (20/25) O.S.Conclusion: Gas-permeable lenses can rehabilitate visionpost-dehiscence repair for an irregular cornea. This patient’stopography, orbscan, and photographs will be illustrated.

Poster 14

Pseudo-accommodation with Monofocal IntraocularLensesJennifer Tam, O.D., Family Vision Care, 4310 GeneseeAvenue, Suite 101, San Diego, California 92117

Background: Cataract is one of the leading causes of blind-ness in the world. Genetic causes are implicated in half ofall congenital and developmental cataracts. Typically, in-fants and children undergo cataract extraction to furtherpromote visual development and avoid visual deprivation.Some patients remain aphakic or undergo intraocular lensimplantation. In the case of pseudophakic patients, they mayexperience a phenomenon known as pseudo-accommoda-tion, that allows the patient to obtain comfortable vision atdistance, intermediate, and near without lens correction.Case Report: A 7-year-old boy was brought to the UCBerkeley Eye Center Binocular Vision Clinic with concernsof difficulties in school, especially in the areas of reversals,writing, and math, but excelled in reading. General healthwas remarkable for asthma. Ocular health was remarkablefor bilateral congenital lamellar cataracts, which had beenextracted in August and September 2000, and monofocalintraocular lenses (AcrySof MA60BM) were implanted inboth eyes. The patient’s father was also noted to have ahistory of bilateral lamellar cataracts as a child and iscurrently aphakic. Best-corrected visual acuity was 20/30monocularly at distance and 20/25 monocularly at near.Refraction showed mild myopia in both eyes and mildagainst-the-rule astigmatism in the right eye. Binoculartesting revealed stereopsis, true fusion, and absence ofstrabismus. On accommodative testing at multiple visits, thepatient’s near point of accommodation was 10 diopters withthe right eye and 2 diopters with the left eye. Anteriorsegment examination was remarkable for clear, well-cen-

271Poster Presentations