Thelansis

  Macular telangiectasia (MacTel) type 2 is a bilateral retinal disorder of unknown etiology, characterized by distinct alterations in the macular capillary network and neurosensory atrophy. Initially, the disease manifests temporally to the foveal center and may expand to encompass an oval region with approximate dimensions of 6° horizontally and 5° vertically centered on the foveola. The onset of symptoms typically occurs during the fifth or sixth decade of life, and a subset of patients reports a positive family history. Due to limited awareness among both clinicians and patients, MacTel type 2 is often diagnosed belatedly and may be misidentified as age-related macular degeneration in cases involving neovascularization. The prevalence of MacTel type 2 is rare, estimated at approximately 0.10%, with no significant gender or racial predilections. The mean age of onset is approximately 55 years. Notably, up to 45% of individuals with MacTel type 2 also present with comorbid cond...