Biomedical subjects

W G Sampson

Publications and source records attributed to W G Sampson.

9 recordsLinked to original sources

PubMed1979

Role of cycloplegia in the management of functional myopia.

Those who undertake the management of functional or physiologic myopia subscribe to the thesis that the accommodative-convergence synkinesis is the primary factor in the development and progression of this condition; therefore monocular or binocular cycloplegia has been employed as the essence of management for nearly a century. The results of an uncontrolled series of young functional myopic patients who were managed with 1% atropine sulfate drops and bifocal spectacle lenses for up to one year are reported, and the author's views on the overall value of such therapy are presented.

Adolescent↗

PubMed1979

Applied optical principles: keratometry.

The optical correction of the aphakic eye requires the addition of a significant amount of vergence power to the corneal interface by one of three modalities: spectacle, contact lens, or intraocular lens. No matter which modality is chosen, based upon Gullstrand's parameters, the corneal interface provides approximately 74% of the effective vergence power of the eye; therefore, it is essential to understand the principles underlying the clinical assessment of the refracting power of the cornea. This presentation briefly reviews selected principles underlying the determination of corneal curvature and toricity by keratometry, as well as their relationship to the correcting spectacle lenses, and emphasizes the necessity of surveying the topography of the cornea for the greatest accuracy in these measurements.

Anthropometry↗

PubMed1972