Effects of Aging on Eye Sight

There are several effects of aging on our eye sight.

Hard to change focus

The lenses of our eye become less pliable, making it harder to change focus from the near to the far.

Yellowing of the lens

The lens of the eye becomes more yellowish and starts to scatter light. The yellowish tinge will often change the look of other colors. For example, blues will seem darker and purple colors will seem more reddish.

However, amazingly, our perception adapts and color vision is not affected much. That is, the world does not take on a yellowish tinge. However, blues will seem darker and purple colors will seem more reddish.

Scattering

Bright lights, especially in the blue region, are scattered by the eye. This can become disorienting, especially with strong oncoming lights like approaching traffic. It may be helpful to wear yellow glasses at night while driving to reduce the amount of blue light entering the eye and, therefore, the amount of scattering.

Difficulty Seeing at Night

The yellowish tinge also absorbs a good deal of the light used for night vision, reducing our ability to see in low light levels.

In low light levels, the rods are less sensitive to blue light and it becomes harder to see at night. Again, wearing yellow glasses at night may help with this.

Del.icio.us     Digg This     Technorati     BlinkList     Furl     Reddit