A new imaging observation in XLRS
A recent case report has described a previously unreported retinal feature in a person with X-linked retinoschisis (XLRS): small changes called inner retinal dimples in the far peripheral retina. The finding is important because XLRS is often discussed in relation to changes at the center of the retina, where vision is sharpest. This report highlights that careful examination of the retinal periphery may reveal additional features of the condition.
For people with XLRS and their families, advances in imaging can improve the understanding of how retinal changes are distributed across the eye. Although this observation comes from one patient and does not yet establish a new standard of care, it offers researchers and clinicians a new feature to investigate in larger groups.
What the case report found
The publication describes a 30-year-old man with molecularly confirmed XLRS who attended a regular follow-up visit. In the month before his examination, he had developed photopsia—perceived flashes of light. His best-corrected visual acuity was 20/40 in the right eye and 20/60 in the left eye, while the front portions of both eyes were unremarkable on examination.
Retinal examination showed foveoschisis, a splitting of retinal layers at the fovea, the central area responsible for detailed vision. This is a key retinal finding associated with XLRS. The examination also identified peripheral retinal changes, especially in the inferior-temporal quadrant—the lower, outer portion of the retina.
One notable feature was a horizontal, band-like vitreous membrane in this peripheral region. The vitreous is the clear gel that fills the eye, and changes at the boundary between the vitreous and retina can be important to document when evaluating peripheral retinal structure.
Using ultrawide-field imaging, the investigators identified inner retinal dimples in the peripheral retina. These dimples corresponded with dark, low-reflectivity spots on en face optical coherence tomography (OCT) images and on ultrawide-field OCT angiography (UWF-OCTA). In simple terms, multiple imaging approaches showed matching small structural changes within the inner retinal layers.
Why ultrawide-field imaging matters
Conventional retinal imaging often focuses on the central retina, where foveoschisis can be assessed directly. In this case, ultrawide-field color fundus photography, fundus autofluorescence, fluorescein angiography, and UWF-OCTA were used with special attention to peripheral retinal findings.
Ultrawide-field imaging allows clinicians to capture more of the retina in a single view than standard central imaging. OCT provides cross-sectional and layer-by-layer structural information, while OCT angiography can visualize retinal blood-flow-related signals without dye injection. En face OCT presents retinal information in a face-on view, which helped the investigators recognize the dimples as dark spots.
The agreement between the en face OCT and UWF-OCTA findings is especially notable. It suggests that the dimples can be detected through more than one imaging perspective, supporting that they represent a reproducible retinal structural observation rather than an isolated appearance on a single test.
What this means for care and treatment research
This report does not show that inner retinal dimples cause vision loss, photopsia, or a particular complication of XLRS. It also does not establish whether these changes are common in XLRS, whether they occur only in some people, or whether they change over time. Those questions require studies involving more patients and repeat imaging.
Still, the finding may help broaden the way XLRS is evaluated in research and clinical follow-up. When clinicians assess peripheral retinal symptoms or changes—particularly in patients reporting new flashes of light—detailed peripheral imaging may provide useful structural information alongside examination of the central retina.
For treatment development, careful imaging is essential. Future studies of treatments, including approaches intended to preserve retinal structure or improve retinal function, need reliable ways to monitor disease features over time. If peripheral inner retinal dimples are confirmed in larger XLRS cohorts, researchers may explore whether they could contribute to a more complete imaging profile of the disease. At present, however, this report is an early observation rather than a treatment target or a marker of treatment response.
Looking ahead
The first report of peripheral inner retinal dimples in XLRS opens a focused area for future research. Larger studies can investigate how often these changes occur, whether they are linked with other peripheral findings, and how they relate to central foveoschisis and visual function. Longitudinal imaging may also determine whether the dimples remain stable or evolve.
This case illustrates the value of looking beyond the central retina. As ultrawide-field imaging becomes increasingly integrated into retinal research, it may reveal additional features that refine understanding of XLRS and help guide future studies of disease monitoring and therapeutic strategies.