Differential Diagnosis for Uniocular Diplopia
Single Most Likely Diagnosis
- Refractive error: This is the most common cause of uniocular diplopia, often due to astigmatism, cataracts, or other conditions affecting the lens or cornea, leading to irregular light refraction.
Other Likely Diagnoses
- Cataract: A cataract can cause uniocular diplopia by altering the way light enters the eye, leading to distorted or double vision.
- Keratoconus: This condition, characterized by a conical deformation of the cornea, can lead to significant visual distortion, including uniocular diplopia.
- Astigmatism: Irregular curvature of the cornea or lens can cause light to focus on two points rather than one, resulting in double vision.
Do Not Miss Diagnoses
- Retinal detachment: Although less common, retinal detachment can cause sudden onset of uniocular diplopia and is a medical emergency requiring immediate attention.
- Vitreous detachment: Similar to retinal detachment, a vitreous detachment can lead to sudden symptoms, including uniocular diplopia, and requires prompt evaluation.
Rare Diagnoses
- Iridocorneal endothelial syndrome: A rare condition affecting the iris and cornea, which can lead to glaucoma, cataract, and uniocular diplopia among other symptoms.
- Chalazion or other eyelid lesions: Although rare, significant eyelid lesions can occasionally cause mechanical interference with vision, leading to uniocular diplopia.
- Optic neuropathy: Certain conditions affecting the optic nerve can result in uniocular diplopia, though this is less common and usually accompanied by other visual disturbances.