A COMPARATIVE STUDY OF CONTACT LENS DEPOSITS USING SCANNING ELECTRON MICROSCOPY AND LIGHT MICROSCOPY

Title A COMPARATIVE STUDY OF CONTACT LENS DEPOSITS USING SCANNING ELECTRON MICROSCOPY AND LIGHT MICROSCOPY
Author, Co-Author Peter Simmons, Jyoti Lama, Alan Tomlinson
Topic
Year
1992
Day
Sunday
Program Number
Poster 4
Room
Great Hall
Affiliation
Abstract The extent of visible surface deposits on three types of low-water, non-ionic soft contact lenses, tetrafilcon A (Aquaflex), crofilcon (CSI), and tefilcon (Cibasoft) was compared using scanning electron microscopy (SEM) and phase-contrast light microscopy (LM). Each of nine subjects wore one of the three lens polymer types on a daily wear basis for seven days, followed by fixation of the lens and preparation for either SEM or LM. Randomly selected lens regions were photographed, and a computerized digitizer used to measure the percentage of lens surface covered by deposits. For eight out of nine subjects, the average of the SEM-based measurements was higher than the average of the LM-based measurements. This difference was significant (pOBJECTIVE ASSESSMENT OF DISCOMFORT GLARE USING ELECTROMYOGRAPHY
Affiliation of Co-Authors
Outline