![]() In this part of the Korean Macular Telangiectasia Type 2 Study, i.e., Report No. The purpose of this multicenter study was to investigate the demographics of MacTel type 2 patients and its clinical characteristics using multimodal imaging after the introduction of SD-OCT in Korea. This improved resolution can now provide more precise images of the macula, and OCT has become a valuable method for diagnosing and studying MacTel type 2. Spectral domain optical coherence tomography (SD-OCT) has allowed for very-high-speed acquisition of images with high resolution. However, these findings included only a limited portion of Asians, and few studies were performed among the Korean population 2, 3. Along with the development of various imaging modalities, clinical findings were better described in The MacTel Project, which started in 2005 1. Macular telangiectasia (MacTel) type 2 is an idiopathic bilateral disease, characterised by macular capillary network alterations and specific changes in the neurosensory retina 1. Inner retinal hyporeflective cavities without outer retinal abnormalities on SD-OCT, although classified as severity scale 3, could be considered a relatively early stage in the disease process in terms of vision. The presented characteristic clinical features of OCT in MacTel type 2 can not only aid in differentiating this disease from others but are also helpful for better judgement of the disease stage in daily clinical practice. Eyes with outer retinal hyperreflective band disruption had lower visual acuity than those without them. Neovascularisation, either subretinal or intraretinal, was found in 14 eyes (8.4%). Four eyes (2.4%) had lamellar macular hole, and five eyes (3.0%) full-thickness macular hole. Disruption of the external limiting membrane, ellipsoid zone, and interdigitation zone were found in 67 (40.4%), 87 (52.4%), and 94 eyes (56.6%), respectively. Hyporeflective cavities (77.7%) were the most frequently detected abnormalities in SD-OCT. ![]() We analysed all the SD-OCT images encompassing the macular area. A retrospective multicentre cross-sectional study was conducted in six tertiary hospitals in Korea and included 129 patients. We analysed the imaging findings of macular telangiectasia (MacTel) type 2 in Korea using spectral domain optical coherence tomography (SD-OCT) and investigated their relationship with visual acuity and clinical stages.
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