Cataract : Symptoms & Signs, Diagnosis & Tests

Symptoms & Signs

Visual problems may include the following changes:

  • Cloudy, fuzzy, foggy, or filmy vision
  • Loss of color intensity
  • Double vision
  • Difficulty seeing at night
  • Problems seeing shapes against a background or the difference between shades of colors
  • Seeing halos around lights
  • Being sensitive to glare

Cataracts generally lead to decreased vision, even in daylight. Most people with cataracts have similar changes in both eyes, although one eye may be worse than the other. Many people with this condition have only mild vision changes.

Other symptoms may include:

  • Frequent changes in eyeglass prescription

Diagnosis & Tests

A standard eye exam and slit lamp examination are used to diagnose cataracts. Other diagnostic tests are rarely needed.


Review Date : 8/11/2009
Reviewed By : Edward B. Feinberg, MD, MPH, Professor and Chair Emeritus, Department of Ophthalmology, Boston University School of Medicine, Boston, MA. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.

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