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. 2013 Jan;120(1):169-74.
doi: 10.1016/j.ophtha.2012.07.051. Epub 2012 Sep 23.

Wide-field spectral-domain optical coherence tomography in patients and carriers of X-linked retinoschisis

Ninel Z Gregori  1 , Byron L Lam, Giovanni Gregori, Sudarshan Ranganathan, Edwin M Stone, Alexis Morante, Fawzi Abukhalil, Potyra R Aroucha
Affiliations

Wide-field spectral-domain optical coherence tomography in patients and carriers of X-linked retinoschisis

Ninel Z Gregori et al. Ophthalmology. 2013 Jan.

Abstract

Purpose: To evaluate macular and extramacular retinal anatomy in patients and carriers of X-linked retinoschisis (XLRS) using a wide-field spectral-domain optical coherence tomography (SD-OCT) imaging technique.

Design: Case series.

Participants: Six XLRS-affected male subjects and 3 XLRS female carriers.

Methods: The subjects prospectively underwent XLRS DNA genotyping and comprehensive ophthalmic examination, including visual acuity, 30-2 Humphrey visual field, fundus photography, and wide-field SD-OCT, a montage technique to generate SD-OCT images spanning approximately 50 degrees horizontally and 35 degrees vertically of the posterior pole.

Main outcome measures: Distribution and location of schisis cavities.

Results: Among male subjects affected by XLRS, asymmetric bilateral schisis was seen in all eyes imaged with montage SD-OCT (11 eyes). Wide-field OCT images demonstrated schisis cavities only in the central macula in 6 eyes (55%), throughout the macula extending to the outside of the temporal arcades in 3 eyes (27%), and throughout the macula extending nasal to the optic nerve in 2 eyes (18%). Cystoid spaces accounting for macular splitting were present in the inner nuclear layer (INL) in all 11 eyes and in the outer nuclear layer (ONL) in 4 eyes. A few small cysts were seen parafoveally in the ganglion cell layer (GCL) or nerve fiber layer (NFL) in 4 eyes. Subclinical extramacular schisis spaces were seen (n=5 eyes) within the INL in 1 eye, the ONL in 1 eye, the INL/GCL/NFL in 1 eye, the ONL/GCL/NFL in 1 eye, and the INL/ONL/GCL/NFL in 1 eye. Schisis was rarely seen nasal to the optic nerve (2 eyes). Central/paracentral visual field defects were seen in 9 eyes. Female carriers did not show schisis on examination or OCT.

Conclusions: Wide-field SD-OCT is a useful tool for evaluating complex retinal anatomy. In patients with XLRS, the foveomacular schisis was seen most frequently in the INL. Subclinical extramacular schisis was seen in 45% of eyes and was equally prevalent in the INL, ONL, and GCL/FNL. The GCL/FNL cystoid spaces were small and seen near the fovea and the arcades only. Carriers were schisis-free.

Financial disclosure(s): The author(s) have no proprietary or commercial interest in any materials discussed in this article.

PubMed Disclaimer

Conflict of interest statement

No conflicting relationships exist for other authors.

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