This 42 page document is similar to Chapter 51 in Volume 5 of Duane's Clinical Ophthalmology, 2001 edition. It discusses various aspects of vision loss and its consequences with emphasis on visual acuity measurement.
The contents include:
ASPECTS OF VISION LOSS
- Anatomical and Structural Changes
Visual functions
Functional vision
Societal and Economic Consequences
Measurement
Rehabilitation
ASSESSMENT of VISUAL ACUITY
- Historical developments 5
Visual Acuity Measurement--Distance vision
- Ranges of vision loss
Measurement considerations
Choice of test distance for normal and near-normal vision
Choice of test distance for low vision
Choice of letter size progression, Use of preferred numbers
Choice of contrast and illumination
Choice of visual acuity notation
Choice of criterion
Choice of test symbols
- Visual Acuity Measurement--Near vision
- Modified Snellen formula
Letter size notations for continuous text
Reading fluency
Infant vision testing
ASSESSMENT of FUNCTIONAL VISION
- Functional Vision Estimates
- General ability score
Visual acuity score
Visual field score
Combining values
