Corneal Biomechanics Following Epi-LASIK

Ryan, Denise S.; Coe, C. D.; Howard, Robin S.; Edwards, J. D.; Bower, Kraig S.

doi:10.3928/1081597x-20110112-01

Cited by 31 publications

(21 citation statements)

References 19 publications

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“…glaucoma, keratoconus and postrefractive eyes). A significant change in the biomechanical properties of the cornea is found after PRK, LASIK and epi-LASIK, measured with ORA [4][5][6]9,[16][17][18][19][20][21][22]. The decrease in the biomechanical values was significantly larger after LASIK than after PRK, three months postoperatively, with the same preoperative data [20].…”

Section: Discussionmentioning

confidence: 66%

Examination of ocular biomechanics with a new Scheimpflug technology after corneal refractive surgery

Hassan¹,

Módis²,

Szalai³

et al. 2014

Contact Lens and Anterior Eye

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a b s t r a c tPurpose: To analyze the early results of a new device measuring ocular biomechanics after corneal refractive surgery. Patients and methods: Thirty nine refractive surgery patients were enrolled in the study (age: 32.6 ± 9.9 years). Laser in situ keratomileusis (LASIK) was performed on 52 eyes of 26 patients and photorefractive keratectomy (PRK) was done on 26 eyes of 13 patients. Ten device-specific biomechanical parameters, intraocular pressure (IOP) and pachymetry were measured preoperatively and at day 1, week 1 and month 1 after the surgeries with a new technology based on Scheimpflug imaging (CorVis ST, Oculus). Results: In case of LASIK, the day after the procedure, radius values showed significant differences compared to preoperative data. One month after surgery, radius values, velocity of the second applanation and pachymetry showed significant differences compared to preoperative data. In case of PRK, the day after the procedure, significant differences in IOP, maximum amplitude at the apex, A1 time, A2 velocity and highest concavity time were measured. After 1 month of PRK, there were no differences in the parameters compared to preoperative data except pachymetry. Conclusions: We observed that some specific biomechanical parameters changed measured with CorVis ST after LASIK and PRK, in the early postoperative time. However, most of these parameters remain unchanged after one month of LASIK and PRK compared to preoperative data.

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Section: Discussionmentioning

confidence: 66%

Examination of ocular biomechanics with a new Scheimpflug technology after corneal refractive surgery

Hassan¹,

Módis²,

Szalai³

et al. 2014

Contact Lens and Anterior Eye

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show abstract

“…Prior studies have demonstrated that there are no detectable changes in corneal biomechanical parameters as a result of intraocular surgery, including phacoemulsification, beyond the 3-month postoperative period. [30][31][32][33] All outputs were reviewed to ensure that films were not interrupted by eyelid movements, and readings were not disrupted by eyelash impact on the corneal surface. Corvis measurements were obtained in duplicates and results were averaged, to minimize effects of test-retest variability noted in prior studies.…”

Section: Subjectsmentioning

confidence: 99%

Novel Parameter of Corneal Biomechanics That Differentiate Normals From Glaucoma

Lee

Chang

Wong

et al. 2016

Journal of Glaucoma

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“…28 Changes in CH and CRF after LASIK, 4-6 epi-LASIK 29 and clear corneal phacoemulsification 30 are well known. CXL causes no changes in the two main parameters measured with ORA, 5,10 however, biomechanical differences were observed in corneas after CXL when applying the latest parameters of the latest ORA software.…”

Section: 811mentioning

confidence: 99%

Repeatability of Ocular Biomechanical Data Measurements With a Scheimpflug-Based Noncontact Device on Normal Corneas

Németh¹,

Hassan²,

Csutak³

et al. 2013

J Refract Surg

116

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any of the instruments used in this study. Flattest and steepest keratometric data and also IOP showed highly significant correlation with the ten specific CorVis ST parameters. Conclusions:The novel technique measuring ocular biomechanical properties showed high repeatability for only IOP and pachymetric data determined in our study. Single measurements are not reliable in case of the ten device-specific parameters. The equipment allows for conducting clinical examinations, and screenings of surgeries altering ocular biomechanical properties with some form of averaging of multiple measurements.

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Corneal Biomechanics Following Epi-LASIK

Abstract: Epi-LASIK resulted in a significant change in CH and CRF postoperatively. Although some recovery occurred over time, CH, CRF, and IOP did not revert to preoperative levels.

Cited by 31 publications

References 19 publications

Examination of ocular biomechanics with a new Scheimpflug technology after corneal refractive surgery

Examination of ocular biomechanics with a new Scheimpflug technology after corneal refractive surgery

Novel Parameter of Corneal Biomechanics That Differentiate Normals From Glaucoma

Repeatability of Ocular Biomechanical Data Measurements With a Scheimpflug-Based Noncontact Device on Normal Corneas

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