Congenital stationary night blindness associated with mutations in GRM6 encoding glutamate receptor MGluR6

first visit) the MHRD had not resolved and the BCVA remained at 20/50. Case 2A 73 year old woman was referred to our clinic with metamorphopsia in her left eye of 3 months' duration.The BCVA was 20/70 and the axial length was 29.39 mm.OCT revealed MHMF (fig 2A and C).One month later, she reported visual loss in her left eye, and OCT showed the resolution of MF and consequent development of MHRD (fig 2D).The BCVA decreased to 20/100.Two months after the first visit, the fundus photograph and OCT still showed MHRD (fig 2B and E).Because the RD has extended and the BCVA remained 20/100, she chose vitrectomy with internal limiting membrane peeling and gas tamponade.After vitrectomy, the MHRD resolved, but the MH did not close.At the last visit (20 months after the first visit), the MH remained open and the BCVA was 20/200.