Posterior staphylomas in non-highly myopic eyes with retinitis pigmentosa
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ORIGINAL PAPER
Posterior staphylomas in non-highly myopic eyes with retinitis pigmentosa Leila El Matri . Yousra Falfoul . Khaled El Matri . Issam El Euch . Hela Ghali . Imen Habibi . Asma Hassairi . Nibrass Chaker . Daniel Schorderet . Ahmed Chebil
Received: 7 November 2019 / Accepted: 20 April 2020 Ó Springer Nature B.V. 2020
Abstract Purpose Our aim was to highlight the presence and the frequency of posterior staphyloma (PS) in nonhighly myopic retinitis pigmentosa (RP) patients and to study the relationship between PS and choroidal thickness (CT). Methods This was a retrospective case–control study of 77 eyes (39 patients) with RP, axial length inferior to 26 mm and clinically preserved macular area. All patients underwent fundus photography, A- and B-scan ocular ultrasonography, fundus autofluorescence (FAF) and swept source optical coherence tomography (SS-OCT). PS was defined by an outward bowing of the sclera on SS-OCT and B-scans. The
L. El Matri Y. Falfoul (&) K. El Matri I. El Euch A. Hassairi N. Chaker A. Chebil Oculogenetic Laboratory LR14SP01, Tunis El Manar University, Tunis, Tunisia e-mail: [email protected] L. El Matri Y. Falfoul K. El Matri A. Hassairi N. Chaker A. Chebil B Department, Hedi Rais Institute of Ophthalmology, Faculty of Medicine of Tunis, Tunis, Tunisia H. Ghali Department of Family and Community Medicine, Faculty of Medicine Ibn El Jazzar, Sousse, Tunisia
relationship between the PS and SS-OCT layers thicknesses was determined. Results Over 77 RP eyes of 39 patients studied, a PS was identified in 17 eyes (22%) of nine patients. Fifteen eyes had a narrow macular staphyloma (NMS), and two eyes had a wide macular staphyloma (WMS). Mean age in this group was 34.2 years (range 19–53 years), mean axial length was 23.60 ± 0.61 mm and mean CT was 185.7 ± 71 um versus 259.7 um in eyes without PS. The staphyloma edges corresponded to area of outer retina loss on SS-OCT and were larger than the hyperautofluorescent ring on FAF.We found a significant association between PS and CT in our RP patients (p = 0.003).The mean CT was significantly thinner in PS eyes compared to eyes without staphyloma. There was no significant association between PS and with visual acuity, years of progression, retinal thickness nor FAF findings. Conclusions PS was present in 22% of non-highly myopic eyes with RP. Narrow macular staphyloma was the most common type observed in our series. A marked thinning of the choroid was noted in PS eyes when compared to RP eyes without PS, as well as the outer retina degeneration. Keywords Posterior staphyloma Non-highly myopic eyes Retinitis pigmentosa Photoreceptors degeneration Choroidal thinning
I. Habibi D. Schorderet IRO-Institute for Research in Ophthalmology, Sion, Switzerland
123
Int Ophthalmol
Introduction Retinitis pigmentosa (RP) is a progressive inherited retinal disease. The primum movens is an alteration of retinal pigment epithelium (RPE)–photoreceptors complex, beginning
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