What is the cause of a triangle-shaped lesion in the eye?

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Last updated: May 28, 2025View editorial policy

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Differential Diagnosis for "Triangle in Eye"

  • Single most likely diagnosis
    • Uveitis (specifically, a triangular or wedge-shaped area of inflammation in the eye): This condition is characterized by inflammation of the uvea, which can cause a variety of symptoms including pain, redness, and vision changes. The "triangle" could be a descriptive term for the area of inflammation.
  • Other Likely diagnoses
    • Retinal detachment: A condition where the retina separates from the back of the eye, which can cause visual disturbances, including seeing shapes or flashes of light.
    • Choroidal melanoma: A type of cancer that can cause a pigmented lesion in the eye, potentially described as a triangle.
    • Optic disc drusen: A condition where yellowish deposits accumulate on the optic disc, potentially causing visual disturbances.
  • Do Not Miss (ddxs that may not be likely, but would be deadly if missed.)
    • Retinal vein occlusion: A condition where the vein that carries blood away from the retina becomes blocked, which can cause sudden vision loss.
    • Central retinal artery occlusion: A condition where the artery that supplies blood to the retina becomes blocked, which can cause sudden and severe vision loss.
    • Endophthalmitis: A severe infection within the eye that can cause vision loss, pain, and redness.
  • Rare diagnoses
    • Coats disease: A rare condition that causes abnormal blood vessel growth in the retina, potentially leading to vision loss.
    • Retinoblastoma: A rare type of eye cancer that can cause visual disturbances, including seeing shapes or flashes of light.
    • Sarcoidosis: A rare autoimmune condition that can cause inflammation in various parts of the body, including the eyes.

Professional Medical Disclaimer

This information is intended for healthcare professionals. Any medical decision-making should rely on clinical judgment and independently verified information. The content provided herein does not replace professional discretion and should be considered supplementary to established clinical guidelines. Healthcare providers should verify all information against primary literature and current practice standards before application in patient care. Dr.Oracle assumes no liability for clinical decisions based on this content.

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