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entire cornea is less conical, but a larger portion of the central area is more ectatic. In this form, abnormal thinning of this ectatic region, and, in particular, of the apex of the cone, is met with without exception. The normal pressure of the upper lid, in marked or advanced cases, is sufficient to distort the shape and outline of the conical protuberance. Forcible contraction of the palpebral fissure produces flattening of this region. Pressure against this ectatic central region with adoi:10.1001/jama.1900.24620330004001a fatcat:7txi6s3blbctffw32ahfkmu2gy