Most common ocular conditions
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Most Common Ocular Conditions. Conditions that Often Accompany Other Visual Exceptionalities Cataracts. Cataracts. A cataract is a clouding of the lens Can vary in degree from a very light “shadowing” to total blockage of light. The word “cataract” comes from….

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Most common ocular conditions

Most Common Ocular Conditions

Conditions that Often Accompany Other Visual Exceptionalities



  • A cataract is a clouding of the lens

  • Can vary in degree from a very light “shadowing” to total blockage of light.

The word cataract comes from
The word “cataract” comes from…

  • The latin word “cataracta” meaning “waterfall”

  • People with cataracts often say that their visual experience is like looking through a waterfall (either small or large)

Signs and symptoms
Signs and symptoms

  • As the cataract grows, the opacity of the lens causes loss of visual acuity

  • The ability to see contrast clearly is also often lost

Signs and symptoms cont
Signs and Symptoms (cont)

  • It becomes more difficult to see the differences between colors

  • Light sensitivity becomes much more pronounced

Progression of development
Progression of development

  • A cataract may actually cause the eye to be more myopic at the beginning of the process.

  • Eventually, the color of the cataract itself changes to light yellow and may affect the perception of color (especially blue)


  • The progressions of the condition is usually slow and may take years to develop to a point where it is noticed.

  • Both eyes are usually affected, though in exceptional cases (e. g. when there is another visual condition) it can affect just one.

Age related cataracts
Age Related cataracts

  • Happens to EVERYONE if they live long enough

  • Begins with a light opacity in the lens

  • Progresses to a swelling of the lens and then

  • The lens shrinks and opacity becomes complete


  • If left untreated, the lens can actually swell to the point that it may become inflamed and even rupture.

  • Eventually the Zonules of Zen can be weakened and the lens capsule can become dislodged

Incidence of cataracts
Incidence of Cataracts

  • World Health Organization reports that 48% of world wide blindness is due to cataracts.

  • 18 million people

  • World wide, services are often inadequate and age related cataracts are not treated.

In the united states
In the United States. . .

  • At least some level of cataracting has been reported at

    • 42% of those between 52 and 64;

    • 60% of those between 65 and 74; and

    • 91% of those between the ages of 75 and 85.

It is generally agreed that
It is generally agreed that . . .

  • The increased depletion of the ozone layer has contributed to the occurrence of cataracts.


Other types of cataracts



Other types of cataracts1
Other types of cataracts

  • Cataracts can also be caused by trauma to the eye inluding:

    • Blunt object trauma often caused by injuries that are work or sports related

Treatment of cataracts
Treatment of cataracts

  • The lens is surgically removed, usually leaving the lens capsule in place:

Then the old lens is replaced
Then the old lens is replaced . . .

  • A small, plastic artificial intraocular lens