In the article entitled “When Is the Optimum Radiological Response to Proton Beam Therapy in Uveal Melanoma?” [Ocul Oncol Pathol. 2023;9(5–6):130–37; DOI: 10.1159/000533308] by Gillam et al., there is an error on page 131 of the article’s Methods section which reads:

“(4/3πa2b)/2 where a is the tumour height in mm and b is the largest basal tumour diameter in mm.”

The description for letter a and letter b was written incorrectly by the authors. Letter ‘a’ should represent the largest basal tumour diameter divided by 2 and letter ‘b’ should represent the tumour height. The correct sentence should therefore read:

“(4/3πa2b)/2 where a is the largest basal tumour diameter in mm divided by two and b is the tumour height in mm.”