Effect of Photorefractive Keratectomy on Optic Nerve Head Topography and Retinal Nerve Fiber Layer Thickness Measured by Heidelberg Retina Tomograph 3
| Autor: | Kourosh Sheibani, Naveed Nilforushan, Reza Soudi, Yahya Shaheen, Pejvak Azadi |
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| Rok vydání: | 2016 |
| Předmět: |
0301 basic medicine
Refractive error medicine.medical_specialty genetic structures medicine.medical_treatment Nerve fiber layer Glaucoma Photorefractive Keratectomy law.invention 03 medical and health sciences chemistry.chemical_compound 0302 clinical medicine lcsh:Ophthalmology law Ophthalmology medicine Myopia Heidelberg Retina Tomograph Heidelberg retina tomograph Dioptre Keratometer business.industry Retinal medicine.disease Photorefractive keratectomy eye diseases 030104 developmental biology medicine.anatomical_structure chemistry lcsh:RE1-994 030221 ophthalmology & optometry Original Article sense organs business |
| Zdroj: | Journal of Ophthalmic & Vision Research Journal of Ophthalmic & Vision Research, Vol 11, Iss 2, Pp 141-145 (2016) |
| ISSN: | 2008-2010 |
| Popis: | Purpose: To determine whether photorefractive keratectomy (PRK) has a significant effect on optic nerve head (ONH) parameters and peripapillary retinal nerve fiber layer (RNFL) thickness measured by the Heidelberg Retina Tomograph 3 (Heidelberg Engineering GmbH, Heidelberg, Germany) in eyes with low to moderate myopia. Methods: This prospective, interventional case series, includes 43 consecutive myopic eyes which were assessed on the day of PRK and 3 months postoperatively using the HRT3. Among the stereometric parameters, we compared disc area, linear cup disc ratio, cup shape measure, global rim area, global rim volume, RNFL height variation contour and mean RNFL thickness; out of the Glaucoma Probability Score (GPS) we assessed changes in global value, rim steepness temporal/superior, and temporal/inferior, as well as cup size and cup depth before and after PRK. Results: Mean refractive error before and after PRK were −3.24 ± 1.31 and −0.20 ± 0.42 diopters, respectively. No significant change occurred in disc area, linear cup disc ratio, cup shape measure, rim area and rim volume among the stereometric parameters; and in rim steepness temporal/superior and rim steepness temporal/inferior in the GPS before and after PRK using the default average keratometry. However, RNFL height variation contour, mean RNFL thickness, and cup size and depth were significantly altered after PRK ( P Conclusion: PRK can affect some HRT3 parameters. Although the most important stereometric parameters for differentiating normal, suspect or glaucomatous patients such as rim and cup measurements in stereometric parameters were not changed. |
| Databáze: | OpenAIRE |
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