Cone dystrophy
Cone dystrophy is a group of rare eye disorders that affect the cone cells of the retina, the light-sensitive tissue at the back of the eye.
Pronunciation
Cone dystrophy is pronounced as /koʊn dɪsˈtrɒfi/.
Etymology
The term "Cone dystrophy" is derived from the Greek words "dys" meaning bad or difficult, and "trophe" meaning nourishment. The term "cone" refers to the cone-shaped cells in the retina that are responsible for color vision.
Definition
Cone dystrophy is a degenerative condition that primarily affects the cone cells, the photoreceptor cells in the retina that are responsible for color vision and visual acuity. The condition is characterized by a progressive loss of these cells, leading to a range of visual impairments including loss of color vision, photophobia (light sensitivity), and reduced visual acuity.
Symptoms
The symptoms of cone dystrophy can vary widely among individuals. They typically include:
- Loss of color vision
- Photophobia
- Reduced visual acuity
- Blind spots in the central field of vision
- Difficulty adapting to changes in light
Causes
Cone dystrophy is usually caused by genetic mutations that affect the normal functioning of the cone cells. These mutations are typically inherited in an autosomal dominant or autosomal recessive manner.
Diagnosis
Diagnosis of cone dystrophy is based on a detailed medical history, a thorough eye examination, and specialized tests such as electroretinography (ERG) and optical coherence tomography (OCT).
Treatment
There is currently no cure for cone dystrophy. Treatment is aimed at managing the symptoms and may include the use of corrective lenses, low vision aids, and counseling to help individuals adapt to their visual impairments.
Related Terms
- Retina
- Photoreceptor Cells
- Genetic Mutations
- Autosomal Dominant
- Autosomal Recessive
- Electroretinography
- Optical Coherence Tomography
External links
- Medical encyclopedia article on Cone dystrophy
- Wikipedia's article - Cone dystrophy
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