Diagnoi of macular peudohole and lamellar macular hole by optical coherence tomography

Purpoe To ae the uefulne of optical coherence tomography (OCT) for better differential diagnoi of macular peudohole (MPH) and lamellar macular hole (LMH). Deign Obervational cae erie. Method etting: Intitutional practice. patient: We reviewed the file of 71 eye of 70 conecutive patient who were diagnoed a having a peudohole or lamellar hole on OCT examination. All patient referred for upected peudohole or lamellar hole on biomicrocopy were evaluated by OCT. main outcome meaure: Each eye underwent ix radial 3-mm OCT can centered on the macula, one 6-mm vertical and one 6-mm horizontal can. Retinal thickne wa meaured at the foveal center and 750 μm from the center, vertically, and horizontally. The diameter of the macular contour wa alo meaured on vertical and horizontal can. Reult In 40 cae, OCT howed a macular profile characteritic of MPH: a teepened foveal pit combined with thickened foveal edge and a mall foveal pit diameter. Central foveal thickne wa normal or lightly increaed (167 ± 42 μm). Mean perifoveal thickne wa greater than normal (363 ± 65 μm). In 29 other cae correponding to LMH, OCT howed a profile characterized by a thin irregular foveal floor, plit foveal edge, and near-normal perifoveal retinal thickne. Central foveolar thickne wa thinner than normal (72 ± 19 μm). Mean perifoveal thickne wa near normal (283 ± 36). Optical coherence tomography did not allow the claification of the remaining two cae. Concluion Optical coherence tomography i very ueful in ditinguihing MPH attributable to epiretinal membrane contraction from LMH becaue of partial opening of a macular cyt.