4D-175 comprises the proprietary low-dose intravitreal R100 AAV vector and a codon-optimized transgene encoding a highly functional shortened form of human complement factor H (sCFH) Complement factor H (CFH) variants with reduced function are a well-validated genetic risk factor for geographic atrophy (GA), with approximately 75% of age-related macular degeneration (AMD) patients carrying a high-risk variant of CFH Over 150 patients have been treated with the R100 vector, including those with wet AMD and d ...