A Cloudy Conical Cornea

Posterior conical cornea.

SINCE this condition was first described (Butler, 1930), only a handful ofcases has been added to the literature. In view of its infrequency, some cases are presented and compared with previous descriptions. Perhaps the name, although anatomically descriptive, is unfortunate, for it would imply that the condition has some relationship with the better-known conical cornea. In fact, there is no e...

An ocular endoscope enables a goniotomy despite a cloudy cornea.

Infantile glaucoma is often initially treated with a surgical goniotomy or trabeculotomy. A goniotomy is not possible if the cornea is too cloudy, despite preoperative glaucoma medications and removal of the corneal epithelium. Bimanual endoscopic goniotomy has been reported in 1 child, but this technique requires great dexterity to maintain the endoscopic image on the needle tip. In the follow...

A cloudy Vlasov solution

We propose to integrate the Vlasov-Poisson equations giving the evolution of a dynam-ical system in phase-space using a continuous set of local basis functions. In practice, the method decomposes the density in phase-space into small smooth units having compact support. We call these small units " clouds " and choose them to be Gaussians of elliptical support. Fortunately, the evolution of thes...

Waves in a Cloudy Vortex

This paper derives a system of equations that approximately govern small-amplitude perturbations in a nonprecipitating cloudy vortex. The cloud coverage can be partial or complete. The model is used to examine moist vortex Rossby wave dynamics analytically and computationally. One example shows that clouds can slow the growth of phase-locked counter-propagating vortex Rossby waves in the eyewal...

Lasing on a cloudy afternoon.