Reflected images can be captured, digitized and analyzed on a computer. The top image shows two normal eyes. The bottom image shows cataracts in both eyes. Hay can determine the optical quality of the eye and the quality of binocular vision in children and adults. Of particular importance is the device's ability to evaluate the vision of children too young to speak, thereby enabling the physician to detect and treat conditions such as amblyopia and crossed eyes early enough in life to be of help.
Children find the test painless.
The instrument requires nothing more from patients than just sitting in front of it. It is totally objective and requires no response from the patients other than keeping their eyes open. It also is safe, noninvasive, fast and inexpensive. Hay said eventually the device could enable physicians to assess the size of cataracts and to monitor their growth. This information will permit the physician to make informed decisions about surgery.