The c.1430T>A variant in MYOC is a missense variant predicted to cause substitution of Isoleucine by Asparagine at amino acid 477 (p.Ile477Asn). This variant was not found in any population of gnomAD (v2.1.1), meeting the ≤ 0.0001 threshold set for PM2_Supporting in a population of at least 10,000 alleles. The REVEL score = 0.534, which was neither above nor below the thresholds for PP3 (≥ 0.7) or BP4 (≤ 0.15), predicting a damaging or benign impact on MYOC function. A previous study (PMID: 16466712) demonstrated that the Ile477Asn protein had reduced secretion levels compared to wild type myocilin protein and met the OddsPath threshold for PS3_Moderate (> 4.3), indicating that this variant did impact protein function. 34 segregations in 2 families, with juvenile or primary open angle glaucoma (JOAG or POAG), have been reported (PMIDs: 9754180, 9535666), which fulfilled PP1_Strong (≥7 meioses in >1 family). 2 probands with JOAG or POAG have been reported carrying this variant (PMIDs: 9754180, 9535666), which met PS4_Supporting (≥ 2 probands). In summary, this variant met the criteria to receive a score of 8 and to be classified as likely pathogenic (likely pathogenic classification range 6 to 9) for juvenile open angle glaucoma based on the ACMG/AMP criteria met, as specified by the ClinGen Glaucoma VCEP (v1, 12 Oct 2021): PP1_Strong, PS3_Moderate, PS4_Supporting, PM2_Supporting