The following are some of the vision-related terms you may hear us use during your exam or when explaining your treatment options. The definitions provided are just to give a general idea of what these terms mean. We try our best to explain things in “every day terms” but if we ever use terminology you’re not familiar with, please don’t hesitate to ask us for an explanation or additional details.


― is an expression used to denote normal eyesight. In countries where metric measurements are used, the term is 6/6. The first number refers to the distance you were from the test chart, which is usually 20 feet or 6 meters. The second number is the distance at which someone with normal eyesight could read the line with the smallest letters that you could correctly read. For example, if your visual acuity is 20/100 that means that the line you correctly read at 20 feet could be read by a person with normal vision at 100 feet.


― refers to your eye’s ability to adjust its focus by the action of the ciliary muscle, which increases your lens focusing power. When this accommodation skill is working properly, your eye can focus and refocus quickly and effortlessly.


― means the clearness of eyesight. Your visual acuity depends on the sharpness of images and the sensitivity of nerve elements in your retina.

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