Contrast sensitivity is the ability to see objects that may not be outlined clearly or don't stand out against a background. Contrast sensitivity often declines along with age. Cataracts, in particular, can affect contrast sensitivity.

A person with low contrast sensitivity may have difficulties with:

• Seeing traffic lights or cars at night
• Reading in low light conditions
• Tired eyes from watching television

It's important to keep in mind that a person with poor contrast sensitivity, due to cataracts, may still test well on the 20/20 visual acuity chart but still experience blurred, cloudy vision.

The AcrySof® IQ lens, in a controlled, randomized clinical study, showed a statistically significant improvement in mesopic contrast sensitivity over the control lens at 90-120 days after the second eye implant. (Mesopic vision is a combination of well-lit conditions and low light conditions.)

Improved Functional Vision in Challenging Environments

[Page updated November 2007]