Optical Coherence Tomography
Eye Care
estimated about CNY 300-600
Disclaimer: This site is a medical service platform; some page content is AI-assisted. Health-related information does not constitute medical advice. If you have any questions, please consult a healthcare professional. See full disclaimer
Description
A non-invasive imaging test that uses light waves to take cross-section pictures of the retina, enabling detailed visualization of retinal layers and aiding in diagnosis and management of ocular diseases.
Main Uses
Primary clinical uses include early detection and longitudinal monitoring of glaucoma (via RNFL and GCIPL analysis), diagnosis and management of retinal diseases (e.g., diabetic retinopathy, age-related macular degeneration, macular holes, epiretinal membranes), assessment of optic nerve head morphology, evaluation of vitreoretinal interface disorders, neuro-ophthalmologic evaluation (e.g., optic neuritis, multiple sclerosis), and guiding intravitreal therapy decisions (e.g., anti-VEGF treatment for macular edema).
Normal Range
OCT is an imaging modality, not a quantitative blood or biochemical test; therefore, it does not have numerical 'normal ranges' in the conventional sense. Instead, interpretation relies on qualitative and semi-quantitative structural metrics: retinal nerve fiber layer (RNFL) thickness (normal: 70–120 µm, varies by age/location), macular ganglion cell-inner plexiform layer (GCIPL) thickness (normal: 65–95 µm), central subfield thickness (CST) in healthy eyes (normal: 200–270 µm), and choroidal thickness (normal: 200–350 µm, highly variable by age, ethnicity, refractive error). Normative databases embedded in OCT devices provide age- and location-matched percentile comparisons (e.g., values <5th percentile flagged as abnormal).
Low Values - Possible Causes
Retinal atrophy (e.g., advanced glaucoma, retinitis pigmentosa), optic nerve degeneration (e.g., optic neuritis sequelae, hereditary optic neuropathies), macular telangiectasia (MacTel), chronic diabetic macular ischemia, severe age-related macular degeneration (geographic atrophy), and post-surgical or post-traumatic retinal thinning.
High Values - Possible Causes
Macular edema (e.g., diabetic macular edema, retinal vein occlusion, uveitic cystoid macular edema), vitreomacular traction syndrome, epiretinal membrane (ERM)-induced retinal thickening, choroidal neovascularization (CNV) with subretinal fluid, and inflammatory retinal infiltration (e.g., sarcoidosis, syphilitic chorioretinitis).
estimated about CNY 300-600
Related Items
Dry Eye Syndrome Treatment
estimated about CNY 200-1000
Phacoemulsification with intraocular lens implantation
estimated about CNY 8000-15000
Femtosecond laser-assisted cataract surgery (FLACS)
estimated about CNY 12000-22000
YAG laser capsulotomy
estimated about CNY 800-1500
Intravitreal injection of ranibizumab
estimated about CNY 5500-6500
Intravitreal injection of conbercept
estimated about CNY 3500-4500