Developmental abnormalities of curvature of cornea or lens are usually regular and possess symmetry; that is, the curvature is either increased or decreased with a regularity that permits of measurement, or at least description in geometric terms. In microcornea, cornea plana, and microphakia, the radius of curvature of the entire surface is either increased or decreased to a visible extent beyond the normal range. In keratoconus and anterior and posterior lentiglobus, only a circumscribed portion of the surface shows the deviation, but the deviation itself, with the exception of some rare cases of peripheral posterior lentiglobus,1 is sufficiently regular to be described fairly accurately as either conical or hemispherical in shape. On the other hand, instances of circumscribed abnormalities of curvature possessing no geometric regularity are rare. The following case presents several such irregularities of the surface curvature and is recorded because of its uniqueness and the problems it
LIVANT S. Bilateral Indentation of Cornea and Lens: A Unique Developmental Anomaly. AMA Arch Ophthalmol. 1956;55(5):681–684. doi:10.1001/archopht.1956.00930030685008
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