History of the Hamilton-Veale Contrast Sensitivity Test
Why did John Veale develop the Hamilton-Veale Test?
Earlier contrast sensitivity tests--such as the Pelli-Robson chart--were large, complex to administer, and often difficult to interpret. As a result, they were underutilized in both clinical practice and home settings.
Yet contrast sensitivity is a crucial visual function that deserves more attention. While eye care professionals routinely measure visual acuity (e.g., 20/20 or 6/6), contrast sensitivity is often skipped.
Loss of contrast sensitivity can indicate a serious decline in visual function, and it often serves as an early warning sign of eye disease. However, this type of visual impairment may remain undetected if contrast sensitivity is not specifically tested.
John Veale recognized the need for a user-friendly, accessible test to identify contrast sensitivity loss--especially for individuals at risk of conditions like glaucoma or macular degeneration. After years of development and refinement, the Hamilton-Veale Contrast Sensitivity Chart was created to fill that need.
What makes the Hamilton-Veale Test different?
- Compact and easy to store
- Simple to use at home or in clinical settings
- Designed for easy interpretation and tracking over time
By regularly recording results, users can track the stability--or deterioration--of their contrast sensitivity. Minor day-to-day fluctuations are normal and may be influenced by time of day, lighting, or general well-being. If variability is noticed, we recommend testing daily until a stable pattern emerges.
Important: A normal visual acuity score (e.g., 20/20) does not rule out the presence of contrast sensitivity loss. If a reduction in contrast sensitivity is observed, further evaluation should be conducted.
