Hina Khan, Aamir Asrar, Muhammad Siddique, Sumaira Amir Joya, Maria Akhtar.
Explaining "Unexplained Visual Loss" with Optical Coherence Tomography.
Pak J Ophthalmol Jan ;32(1):9-15.

Purpose: To determine various pathologies detected by Optical Coherence Tomography (OCT) in patients with Unexplained Visual Loss (UVL). Study Design: A retrospective case review. Place and Duration: Amanat Eye Hospital from October 2014 to October 2015. Material and Methods: All cases of UVL were scanned on Heidelberg Spectralis Spectral Domain OCT machine on EDI mode. The scans so obtained were evaluated for a possible pathology that was responsible for the visual loss. Frequency tables were charted on this basis. Results: 83 patients with unexplained visual loss and apparently normal fundi were reviewed. In 37 cases, a definitive diagnosis was provided with the help of OCT imaging. 10 (27.03%) patients showed vitreomacular traction, 5 (13.51%) showed epiretinal membranes, 4 (10.81%) showed early stages of macular hole, 2 (5.4%) showed lamellar holes, 3 (8.1%) showed idiopathic macular telangiectasia, 4 (10.81%) were children with cone dystrophy and there were single cases (2.7%) each of Juvenile X-linked Retinoschisis, retinal arteritis, Acute macular neuroretinopathy and solar maculopathy. 5 (13.51%) patients showed a selective foveal atrophy of one or both eyes but the cause could not be determined. 46 patients with unexplained visual loss showed a normal OCT. Conclusion: OCT was able to identify various retinal pathologies in patients with UVL that was missed on fundus exam. With its help, a wide fraction of patients labeled with UVL were excluded from this obscure diagnosis.

PakMediNet -Pakistan's largest Database of Pakistani Medical Journals - http://www.pakmedinet.com