Cone dystrophy is usually present in early infancy or during childhood or early adulthood. However, the disorder has been reported to develop in individuals of all ages including older adults. [rarediseases.org]

Presentation[edit] The most common symptoms of cone dystrophy are vision loss (age of onset ranging from the late teens to the sixties), sensitivity to bright lights, and poor color vision. Therefore, patients see better at dusk. [en.wikipedia.org]

• Pallor

  In addition to the retinal findings, temporal pallor of the optic disc is commonly observed. As expected, visual field testing in cone dystrophy usually reveals a central scotoma. [en.wikipedia.org]

• Night Blindness

  Over time, affected individuals develop night blindness and a worsening of their peripheral vision, which can limit independent mobility. [medlineplus.gov]

• Peripheral Vision Loss

  These features are typically followed by impaired color vision (dyschromatopsia), blind spots (scotomas) in the center of the visual field, and partial side (peripheral) vision loss. [medlineplus.gov]

• Central Scotoma

  As expected, visual field testing in cone dystrophy usually reveals a central scotoma. In cases with the typical bull’s-eye appearance, there is often relative central sparing. [en.wikipedia.org]

• Visual Impairment

  Impairments (NAPVI) Phone: (617) 972-7441 Toll-free: (800) 562-6265 Email: [email protected] Website: http://www.napvi.org National Federation of the Blind 200 East Wells Street at Jernigan Place Baltimore, MD 21230 USA Phone: (410) 659-9314 Email: [ [rarediseases.org]

• Nystagmus

  As the condition progresses, individuals may develop involuntary eye movements (nystagmus). [medlineplus.gov]

  Some affected individuals may develop rapid, involuntary eye movements (nystagmus). In the progressive form of cone dystrophy, vision continues to deteriorate over time. [rarediseases.org]

• Ataxia

  Cone dystrophy Fundus of a 34-year-old patient with cone rod dystrophy due to Spinocerebellar Ataxia Type 7 (SCA7). Note that the macular area, and also the mid periphery, are atrophic. [en.wikipedia.org]

The inclusion of fluorescein angiography in the workup of these patients is important since it can help detect many of these characteristic ophthalmoscopic features. [en.wikipedia.org]

• Central Scotoma

  As expected, visual field testing in cone dystrophy usually reveals a central scotoma. In cases with the typical bull’s-eye appearance, there is often relative central sparing. [en.wikipedia.org]

Standard Therapies Treatment There is no cure for cone dystrophy. Treatment is directed toward the specific symptoms that are apparent in each individual. [rarediseases.org]

[citation needed] Treatment[edit] Though there is no treatment for cone dystrophy, certain supplements may help in delaying the progression of the disease. [en.wikipedia.org]

Clinical course, genetic etiology, and visual outcome in cone and cone-rod dystrophy. Ophthalmology. 2012 Apr;119(4):819-26. doi: 10.1016/j.ophtha.2011.10.011. Epub 2012 Jan 20. Citation on PubMed [medlineplus.gov]