Cone Dystrophy

Condition 101

What is the definition of Cone Dystrophy?

Cone dystrophy is a general term for a group of rare eye disorders that affect the cone cells of the retina. Cone cells allow a person to see color and fine detail, and they work best in bright light. The cone dystrophies can cause a variety of symptoms such as decreased visual clarit ...

For more information, visit GARD

How is Cone Dystrophy diagnosed?

The diagnosis of cone dystrophy is made based upon the presence of characteristic symptoms, a detailed family history, a thorough clinical evaluation and a number of supporting tests. While exams that measure visual acuity, perception of color, and field of vision are used to arrive at a proper diagnosis, an electroretinogram (ERG) is used to confirm the diagnosis.

During an ERG, eye drops are used to numb the eye before a special contact lens recorder is placed on the eye. Then a series of flashes of light are used to stimulate the retina. Doctors can then measure the electrical response of the rods and cones to the light. The test is performed twice – once in  bright room and again in a dark room. A weak of absent signal of cone cells indicates cone dystrophy. More details about the diagnosis of cone dystrophy can be accessed through the University of Michigan Kellogg Eye Center

Top Global Doctors

Latest Research

Latest Advance
  • Condition: Low Vision
  • Journal: Indian journal of ophthalmology
  • Treatment Used: Augmented Reality Technology
  • Number of Patients: 100
  • Published —
In this study, researchers evaluated the effects of using augmented reality technology on adults with low vision.
Latest Advance
  • Condition: Age-Related Macular Degeneration (AMD)
  • Journal: Investigative ophthalmology & visual science
  • Treatment Used: Low-Level Nighttime Light Therapy
  • Number of Patients: 60
  • Published —
This study investigated the safety, acceptability, and effectiveness of light therapy on the progression of age-related macular degeneration (AMD) over 12 months.

Clinical Trials

Clinical Trial
  • Status: Recruiting
  • Study Type: Procedure
  • Participants: 500
  • Start Date: January 2016
Bone Marrow Derived Stem Cell Ophthalmology Treatment Study II
Clinical Trial
  • Status: Recruiting
  • Participants: 20000
  • Start Date: June 2014
Foundation Fighting Blindness Registry, My Retina Tracker
Clinical Trial
  • Status: Recruiting
  • Study Type: Drug
  • Participants: 100
  • Start Date: December 2008
Cholesterol and Antioxidant Treatment in Patients With Smith-Lemli-Opitz Syndrome (SLOS)