Evaluation of penetrating keratoplasty in keratoconus

Sayegh, Fouad N.; Ehlers, Niels; Farah, Iyad

doi:10.1111/j.1755-3768.1988.tb04030.x

Cited by 29 publications

(2 citation statements)

References 1 publication

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“…The mean follow-up was 11.3 years, during which 90% of grafts remained clear and 73% of the eyes achieved 0.5 or better vision 56. In a 9-year follow-up study, Sayegh et al found the postoperative visual acuity to be better after surgery in 96%, unchanged in 3%, and worse in 1% of the cases 57. Similar results have been reported by other authors 7 58–60…”

Section: Corneal Transplantation For Keratoconussupporting

confidence: 68%

Management of keratoconus: current scenario

Jhanji

Sharma

Vajpayee

2010

British Journal of Ophthalmology

186

101

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Keratoconus is an ectatic corneal dystrophy and is a leading indication for corneal transplantation surgery worldwide. The disease was first described in detail more than 150 years ago by Dr John Nottingham, but the understanding of the disease and its management have undergone significant changes over the last few decades. Corneal specialists have adopted new techniques and technologies for the effective management of keratoconus, while adhering to the age-old concepts of contact lens fitting and penetrating keratoplasty. Lamellar keratoplasty has been revived with improved outcomes and devices such as intracorneal ring segments are being used to treat cases of early keratoconus effectively. This review article discusses the current scenario on the surgical as well as non-surgical management of keratoconus with a focus on the established, novel and emerging treatment modalities.

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Section: Corneal Transplantation For Keratoconussupporting

confidence: 68%

Management of keratoconus: current scenario

Jhanji

Sharma

Vajpayee

2010

British Journal of Ophthalmology

186

101

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“…Postoperatively induced astigmatism after PK can severely limit visual rehabilitation because of anisometropia and visual impairment associated with increased HOAs. 14 To our knowledge, the current study is the first report in the literature that shows the rehabilitation of corneal wavefront aberrations with the use of SCLs after PK. We also aimed to present unwanted events during the follow-up time.…”

Section: Discussionmentioning

confidence: 71%

Efficiency and Safety of Scleral Lenses in Rehabilitation of Refractive Errors and High Order Aberrations After Penetrating Keratoplasty

Penbe¹,

Kanar²,

Şimşek³

2020

Eye &Amp; Contact Lens: Science &Amp; Clinical Practice

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Objectives: Visual rehabilitation after penetrating keratoplasty (PK) has difficulties linked to the high spherical and/or cylindric refractive errors with high order aberrations (HOAs) based on the ocular surface irregularities. We aimed to present the scleral contact lens (SCL)-induced complications and improvements in refractive errors and HOA with SCL fitting in post-PK patients. Methods: In this prospective study, 38 eyes of 35 patients who underwent PK and using SCLs were included. Uncorrected visual acuity, bestcorrected visual acuity (BCVA), spherical equivalence, manifest astigmatism (Cyl), keratometry, and wavefront analyses of HOAs with corneal topography of all patients were measured before SCL and after 8 hrs of SCL wearing-on. The endothelial cellular density (ECD) changes at 6 months were also recorded. Any complications related to SCL were noted. Results: All patients showed an improvement in visual acuity with SCL. Uncorrected visual acuity before SCL fitting was 1.1560.26 log of minimal angle of resolution (logMAR) and BCVA was 0.8460.24 logMAR. The contact lens-corrected visual acuity decreased to 0.1360.09 logMAR. Spherical equivalence, Cyl, and keratometry parameters decreased significantly with SCL. The anterior corneal HOAs, coma, and astigmatism coefficients decreased significantly. Conjunctival prolapse (in one eye) and graft rejection episode (in two eyes) were observed during follow-up time (14.2561.3 months) and they restarted to use SCLs after treatment. The ECD decrease was similar with those who not using SCLs after PK in the literature. Conclusion:Our results indicate that scleral lenses may be a safe and effective option for the treatment of corneal astigmatism and HOAs associated with PK.

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Visual results after corneal transplantation

1989

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The results of corneal transplantation can be measured by the percentage of clear grafts and by the subsequent visual acuity. In this study we summarized the visual results in five corneal diseases with a low rate of graft failure. Keratoconus patients achieved an average visual acuity of 0.5 one year after transplantation, while patients with corneal decompensation after previous cataract operation only reached an average of 0.2. Sometimes visual results were hampered by clouding of the graft and the reason for clouding was analysed in such cases. Reversible and irreversible rejections occurred with the highest frequency immediately after transplantation, and while in primary grafts 60% of rejections was reversible, only two out of ten repeat transplants could be saved. This indicates that more measures are necessary to prevent failure of secondary transplants in order to obtain the goal of useful vision.

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Evaluation of penetrating keratoplasty in keratoconus

Cited by 29 publications

References 1 publication

Management of keratoconus: current scenario

Management of keratoconus: current scenario

Efficiency and Safety of Scleral Lenses in Rehabilitation of Refractive Errors and High Order Aberrations After Penetrating Keratoplasty

Visual results after corneal transplantation

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