CS. Hoyt and FA. Billson (1977). Low-carbohydrate diet optic neuropathy. The Medical journal of Australia, 1(3), 65-6. https://doi.org/10.5694/j.1326-5377.1977.tb130506.x

PubMed 840092

[Abstract]
Visual loss occurring in two patients taking prolonged carbohydrate-restrictive diets is reported. The clinical data in these patients point to a specific diet deficiency of thiamine, causing a bilateral optic neuropathy. A discussion of current concepts of thiamine deficiency in neuroophthalmic disorders is presented. It is recommended that patients on low-carbohydrate diets for prolonged periods of time should receive thiamine supplements.