Faculty of Medicine, McGill University, Montreal, QC.
Department of Ophthalmology, University of Ottawa, Ottawa, ON.
Can J Ophthalmol. 2024 Apr;59(2):e117-e123. doi: 10.1016/j.jcjo.2023.01.009. Epub 2023 Feb 13.
To design and validate the first visual acuity (VA) chart in the Canadian Aboriginal syllabics (CAS) alphabet.
Prospective, nonrandomized, within-subjects cross-sectional study.
Twenty Latin- and CAS-reading subjects were recruited from Ullivik, a residence in Montreal for Inuit patients.
VA charts were made in Latin and in CAS using letters conserved across Inuktitut, Cree, and Ojibwe languages. Fonts were similar in style and size between charts. Each chart was made for a viewing distance of 3 m, with 11 lines of VAs from 20/200 to 20/10. Charts were created using LaTeX to ensure proper formatting and optotype sizing and displayed to scale on an iPad Pro. Each participant had his or her best-corrected VA for each eye measured using the Latin and CAS charts sequentially for a total of 40 eyes.
Median best-corrected VAs were 0.04 logMAR (range, -0.06-0.54) and 0.07 logMAR (range, 0-0.54) for the Latin and CAS charts, respectively. Median difference between CAS and Latin charts was 0 logMAR (range, -0.08-0.1). Mean ± SD difference between charts was 0.01 ± 0.03 logMAR. Pearson's r correlation between groups was 0.97. The two-tailed paired t test between groups was p = 0.26.
We demonstrate here the first VA chart in Canadian Aboriginal syllabics for Inuktitut-, Ojibwe-, and Cree-reading patients. The CAS VA chart has highly similar measurements to the standard Snellen chart. Testing VA for Indigenous patients in their native alphabet may provide patient-centred care and accurate VA measurements for Indigenous Canadians.
设计并验证首个加拿大原住民音节文字（CAS）字母表中的视力（VA）图表。
前瞻性、非随机、受试者内的横断面研究。
从蒙特利尔的因纽特人患者住所 Ullivik 招募了 20 名拉丁和 CAS 阅读者。
使用在因纽特语、克里语和奥吉布瓦语中保持一致的字母，以拉丁和 CAS 制作 VA 图表。图表的字体在风格和大小上相似。每张图表的视距均为 3 米，从 20/200 到 20/10 共有 11 行 VA。使用 LaTeX 创建图表，以确保正确的格式和视标大小，并在 iPad Pro 上按比例显示。每位参与者使用拉丁和 CAS 图表分别测量其每只眼睛的最佳矫正视力，总共测量了 40 只眼睛。
拉丁和 CAS 图表的中位数最佳矫正视力分别为 0.04 logMAR（范围，-0.06-0.54）和 0.07 logMAR（范围，0-0.54）。CAS 和拉丁图表之间的中位数差异为 0 logMAR（范围，-0.08-0.1）。图表之间的平均差异为±0.03 logMAR。两组之间的 Pearson r 相关性为 0.97。两组之间的双侧配对 t 检验为 p=0.26。
我们在这里展示了第一个用于阅读因纽特语、奥吉布瓦语和克里语的加拿大原住民音节文字的 VA 图表。CAS VA 图表与标准 Snellen 图表具有高度相似的测量值。在患者的母语字母表中为原住民患者测试 VA 可能为加拿大原住民提供以患者为中心的护理和准确的 VA 测量。
