. Purpose:  To report the optical coherence tomography (OCT) findings in cases of chorioretinal and choroidal folds. Methods:  Eight subjects with folds of the fundus of the eye were examined with fundus photography, fluorescein angiography, B‐scan ultrasonography and Stratus OCT. Results:  Two types patterns were found on OCT. Five cases showed undulating retinal as well as retinal pigment epithelial lines of normal thickness; these were defined as chorioretinal folds. The posterior vitreous surface often adhered to the crests of the folds only. Three cases exhibited a wavy appearance of the retinal pigment epithelium and a flat retinal surface; these were classified as choroidal folds. Conclusions:  Scanning by OCT can differentiate chorioretinal folds from choroidal folds and reveal the relationships between the folds and the posterior vitreous surface.

Congenital hypertrophy of the retinal pigment epithelium (CHRPE) shows different findings during optical coherence tomography scans. Homogeneously black CHRPE shows a hyperreflective band at the level of retinal pigment epithelium (RPE) with total shadowing of deeper structures, while gray patches of CHRPE with lacunae present an irregular and interrrupted hyperreflective RPE band with penetration of the optical beam into the choroid. Optical coherence tomography can be a useful test in the study of pigmented tumors of retina and RPE.

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In cases of Bietti crystalline tapetoretinal dystrophy, OCT shows changes secondary to fundus atrophy and more specific changes that can be related to the presence of crystals, thereby making OCT particularly useful for demonstrating macular atrophic abnormalities.