Optic disc imaging encompasses modern techniques that capture and quantify optic nerve head structure using devices such as OCT and scanning laser ophthalmoscopes. It extends traditional photography with detailed measurements.
Approach
OCT provides cross-sectional and en face images of the disc and peripapillary tissues, while scanning laser systems create topographic maps of disc contour. Software calculates parameters like rim area, cup depth, and disc volume.
- Non-contact imaging usually performed with dilated or naturally large pupils
- Three-dimensional reconstructions can be viewed from multiple angles
- Normative databases flag values outside expected ranges
- Progression analysis compares each scan to previous visits
Clinical Applications
Optic disc imaging helps detect and track glaucomatous damage and other optic neuropathies with greater precision than visual inspection alone. It supports early intervention and monitoring of treatment effectiveness.
- Objective metrics reduce reliance on subjective disc drawings
- Combining disc, nerve fibre, and ganglion cell data improves risk assessment
- Image quality and reproducibility are essential for reliable follow-up
- Findings are integrated with clinical and functional information
