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Paramacular coloboma.

Debi Pian1, Steven Ferrucci, Sheila F Anderson

  • 1VA Greater Los Angeles Healthcare System, Santa Barbara Community-Based Outpatient Clinic, Santa Barbara, CA, USA.

Optometry and Vision Science : Official Publication of the American Academy of Optometry
|August 15, 2003
PubMed
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Paramacular coloboma, a congenital lesion temporal to the macula, presents as an oval, football-shaped chorioretinal scar. These typically asymptomatic findings usually have normal visual acuity and visual fields.

Area of Science:

  • Ophthalmology
  • Retinal Diseases
  • Congenital Abnormalities

Background:

  • Paramacular coloboma is a rare chorioretinal lesion.
  • Its etiology and characteristic shape/location are debated.
  • Congenital origin due to aberrant macular development is proposed.

Observation:

  • Presents as a solitary, oval, football-shaped lesion temporal to the fovea.
  • Typically unilateral and asymptomatic.
  • May be associated with blepharophimosis, situs inversus, or vascular anomalies.

Findings:

  • Three cases of asymptomatic unilateral paramacular colobomata are reported.
  • Lesions were discovered during routine eye examinations.
  • Visual acuity and visual field testing were normal in all cases.

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Implications:

  • Paramacular colobomata are congenital and consistently located temporal to the macula.
  • Visual function is usually preserved, though mild scotomas may occur.
  • Distinguishing from acquired conditions like AMD and ocular histoplasmosis is crucial.