No abstract

No abstract

No abstract

An infra-red pupillometer was used to record pupillary unrest, or hippus, on three observers at various steady illuminance levels. Frequency spectrum analysis of pupillary oscillations shows that, in logarithmic units, amplitude per unit frequency is a decreasing linear function of frequency, and that amplitudes are reduced at higher illuminance levels. Hippus was then recorded for one observer in the presence of extreme discomfort glare. The resulting frequency spectrum is very similar to spectra obtained in high luminance non-glaring conditions. It is concluded that pupillary hippus is unlikely to be a factor in the genesis of the discomfort felt under conditions of glare.

The survey identifies the priorities of experts in determining the severity of pterygium. More precise and clearly defined evaluation methods will enhance future clinical and epidemiologic studies of pterygium. The ranked list of pterygium signs, symptoms, and tests can serve as a guide for developing pterygium evaluation methods in the future. There is a need for a method that accurately and precisely quantifies the distance of pterygium encroachment onto the cornea and the pterygium progression rate. Furthermore, there is a need for an assessment of patient symptoms.

No abstract