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Investigation of corneal biomechanics at moderate to high refractive errors.
Inceoglu, Nehir; Emre, Sinan; Ulusoy, Mahmut Oguz.
Afiliação
  • Inceoglu N; Department of Ophthalmology, Turgutlu State Hospital, Manisa, Turkey.
  • Emre S; Department of Ophthalmology, School of Medicine, Baskent University Zubeyde Hanim Hospital, Izmir, Turkey.
  • Ulusoy MO; Department of Ophthalmology, School of Medicine, Baskent University Konya Research Hospital, Goz Hastaliklari Anabilim Dali, 42000, Konya, Turkey. drmoguz@gmail.com.
Int Ophthalmol ; 38(3): 1061-1067, 2018 Jun.
Article em En | MEDLINE | ID: mdl-28540493
PURPOSE: Corneal hysteresis (CH) and corneal resistance factor (CRF) are corneal biomechanical parameters which were measured by ocular response analyzer (ORA). Aim of this study was to define the CH and CRF in high myopic and hyperopic patients and compare the results with emmetropic control group. METHODS: A total of 193 eyes of 100 healthy volunteers were included. Study groups were high myopic patients (n = 27) with spherical refractive errors (SRE) of greater than -5.00D, high hyperopic patients (n = 20) with SRE of greater than +3.00D and controls (n = 53) with SRE between ± 1.00D. All subjects underwent IOP and corneal biomechanical evaluation with the ORA. Also Goldmann applanation tonometry (GAT), central corneal thickness (CCT), corneal curvature and axial length measurements were taken. RESULTS: Mean age of groups was 30.7 ± 6.9, 29.1 ± 7.7, 28.9 ± 5.6 years (p > 0.05). Among study groups except CRF and CCT, all parameters were significantly different between study groups. CH was lowest in the high myopic group and highest in the high hyperopia. In all groups, there were significant correlations between CH and CRF, CCT, SRE, SE (spherical equivalent), AL (axial length) and between CRF and CCT. GAT and IOPg (Goldmann-correlated intraocular pressure) measurements were significantly correlated with CCT (p < 0.05). One of the major findings was as the CH approaches 11.2 mmHg, IOPcc (corneal-compensated intraocular pressure) and IOPg get close to each other. CONCLUSIONS: The results revealed that CRF is not affected by refractive errors and IOPcc is not affected by any other ocular parameter. The difference between IOPcc and IOPg was greatest in myopic group, and IOP (intraocular pressure) measurement in these patients deserves high suspicion.
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Texto completo: 1 Base de dados: MEDLINE Assunto principal: Refração Ocular / Erros de Refração / Córnea / Pressão Intraocular Tipo de estudo: Diagnostic_studies Limite: Adult / Female / Humans / Male Idioma: En Ano de publicação: 2018 Tipo de documento: Article

Texto completo: 1 Base de dados: MEDLINE Assunto principal: Refração Ocular / Erros de Refração / Córnea / Pressão Intraocular Tipo de estudo: Diagnostic_studies Limite: Adult / Female / Humans / Male Idioma: En Ano de publicação: 2018 Tipo de documento: Article