Diurnal Study Of Normal Corneas.

The major purpose of this study was to determine if the cornea remains relatively unchanged during a prolonged period of time. Although our sample was not large, our data statistically indicates that for most of the parameters measured, there was not a clinically significant change in the cornea's shape. Using the Corneal Analysis System (Eyesys) made the data more reliable, repeatable and without significant human error. The female's cornea was shown to be predominantly spherical, while the male's cornea did show an asymmetrical bow tie. This bow tie pattern has some clinical meaning that the subject has a greater amount of astigmatism than the round pattern that was seen in the female. The
other two topographic patterns are oval and symmetrical bow tie. The oval and round patterns are clinically considered the same. The symmetrical bow tie also means that there is astigmatism at the cornea but not to the extent of the asymmetrical bow tie. Further investigation with a larger sample and for a longer period of time may indicate that there are some significant changes of the cornea, but that is beyond the scope of this paper.