vitreous syneresis inherited vitreoretinopathy vitreoretinal degeneration https://github.com/monarch-initiative/mondo/issues/4407 https://rarediseases.info.nih.gov/diseases/5506/vitreoretinal-degeneration degenerative vitreoretinopathy Orphanet:98670 UMLS:C0344290 HP:0007964 MEDGEN:87480 MONDO:0020248 GARD:0005506 SCTID:247182006