The electro-oculogram in eyes with choroidal melanoma

Area of Science:

• Ophthalmology
• Medical Diagnostics

Background:

• Choroidal melanoma and nevus are common ocular tumors.
• The electro-oculogram (EOG) measures retinal function.

Purpose of the Study:

• To compare EOG values in eyes with choroidal melanoma to those with choroidal nevus and normal controls.
• To assess if EOG can differentiate between choroidal melanoma and nevus.

Main Methods:

• Electro-oculogram (EOG) recordings were obtained from 20 patients with choroidal melanoma (involved and uninvolved eyes).
• EOG data were compared to 10 patients with choroidal nevus and 19 normal controls.
• Tumor size and retinal detachment extent were analyzed for correlation.

Main Results:

• A statistically significant reduction in EOG was observed in eyes with choroidal melanomas compared to eyes with choroidal nevi.
• No significant difference in EOG was found between normal eyes and the uninvolved eyes of melanoma patients.
• EOG values in patients with choroidal nevi were comparable to normal controls, irrespective of tumor size or retinal detachment.

Conclusions:

• The electro-oculogram (EOG) may serve as a diagnostic tool to distinguish choroidal melanoma from choroidal nevus.
• EOG is a reliable indicator of retinal function in the absence of melanoma, as shown by normal EOG in unaffected eyes of melanoma patients.