Impaired Vision

For People with Poor Perception

Definition

Visual impairment is a severe reduction that cannot be corrected with standard eyeglasses or contact lenses and reduces a person's ability to function at certain or all tasks.

Symptoms

The only real symptom of impaired vision is vision difficulties or loss.

Causes

There are many possible causes for impaired vision. These include:


  • Presbyopia
  • Cataracts
  • Glaucoma
  • Diabetic Retinopathy
  • Macular Degeneration
  • Eye infection, inflammation, or injury
  • Floaters
  • Night Blindness
  • Retinal Detachment
  • Optic Neuritis
  • Strokes or TIA
  • Brain Tumors
  • Bleeding into the eye
  • Temporal arteritis
  • Migraine Headaches
  • Being born with it

Prevention

Here are some ways to prevent impaired vision.

  1. Receive regular screening for vision problems.
  2. Control conditions that can lead to impaired vision.
  3. Wear safety glasses or goggles during hazardous activities.
  4. Follow directions for wearing, cleaning, and storing corrective lenses.
  5. Seek early evaluation for eye infections.
  6. Pregnant women should receive proper prenatal care to prevent it for their baby/babies.

Treatment

Treatment for impaired vision may be more varied than you think. Options include:


  • Convex lens aids
  • Hand-hens or stand-mounted magnifiers
  • Telescopic systems
  • Non-optical devices
  • Electronic reading systems


Statistics

  • Around 800 million people are blind, have severe visual impairment, or are near sighted.
  • 145 million people have low vision due to uncorrected refractive errors.
  • 82% of people with impaired vision are 50 or older
  • Over 12 million people ages 5-15 are visually impaired due to uncorrected refractive errors

Diagnosis

Here are the steps for diagnosing visual impairment:

  1. The doctor will have you look at a standard eye chart while looking through different lens.
  2. The doctor will shine a light in your eye to look for damage to the retina or optic nerve.
  3. A process called tonometry will be used to check for pressure on the optic nerve.
  4. The doctor will ask questions that could be linked with visual impairment.

Research Sources

Source: "Vision Impairment (VI)." Vision Impairment (VI). N.p., n.d. Web. 26 Apr. 2013.

Source: "Health Guide." Vision Problems. N.p., n.d. Web. 26 Apr. 2013.

Source: "Healthopedia.com - Visual Impairment: Prevention & Expectations (Impaired Vision)."Healthopedia.com - Visual Impairment: Prevention & Expectations (Impaired Vision). N.p., n.d. Web. 26 Apr. 2013.

Source: "Treating Low Vision." Treating Low Vision. N.p., n.d. Web. 28 Apr. 2013.

Source: "Choose a Contact Lens That Will Optimize Your Vision and Lens Wearing Experience." Vision Statistics, CIBA VISION. N.p., n.d. Web. 28 Apr. 2013.

Source: "How Are Visual Impairments Diagnosed?" Sharecare. N.p., n.d. Web. 28 Apr. 2013.