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Arch Ophthalmol. 1999;117:89.

	Since this article does not have an abstract, we have provided the first 81 words of the full text and any section headings.

Conical Cornea

Soon after the immortal invention of Helmholtz, I found the ophthalmoscope very useful in detecting slight degrees of conical cornea. For this purpose the concave mirror only is to be used without a convex lens. On turning the mirror so as to throw light at different angles, the side of the cone opposite to the light is dark.

Reference: Bowman W. On conical cornea and its treatment by operation. Ophthalmic Hosp Rep and J R Lond Ophthalmic Hosp. 1859;9:157.