Use of the ISNT rule for optic disc evaluation in 40 to 79 year old patients seen in optometric practice. Scand J Optom Vis Sci [Internet]. 2022 Oct. 4 [cited 2026 Mar. 14];3(1):s. 16-22. Available from: https://open.lnu.se/index.php/sjovs/article/view/3358