Retinoschisis: splitting hairs on retinal splitting

Retinoschisis can be found in the fovea or the retinal periphery, either of which may be present in isolation, or in conjunction with each other. Foveal schisis may be congenital, acquired, or secondary to an associated ocular pathology such as optic pit, glaucoma, or pathological myopia. The visual acuity is dependent on the cause of the schisis and appropriate treatment is variable based on likelihood for progression and visual impact. There are many useful considerations and tools for evaluation and monitoring that can be used to determine the aetiology and prognosis of these retinal findings. Retinoschisis is a diagnosis of exclusion, and pathology must be ruled out to accurately make the diagnosis. A review of two cases and following discussion summarises the various types, manifestations, presentations, and complications of retinoschisis and their evaluation, management, and appropriate monitoring or treatment. These cases lead a dialogue on the presentation and aetiology of retinoschisis, important considerations for differential diagnoses, and appropriate management.