High-speed imaging in ophthalmology uses cameras or scanning systems capable of capturing rapid sequences of images to analyse fast ocular events. It is applied to phenomena such as tear film dynamics, saccades, and vascular flow.
Techniques
Devices record many frames per second, sometimes synchronised with stimuli or other measurements. The resulting data allow frame-by-frame analysis of transient changes that would be blurred or missed with standard imaging.
- Requires high-sensitivity sensors and appropriate illumination
- Generates large data volumes that need specialised analysis
- May be combined with slit-lamp, OCT, or infrared imaging
- Can track rapid eye movements or tear film break-up
Applications
High-speed imaging is mainly used in research and selected clinical scenarios, such as evaluating nystagmus, blink dynamics, or intraoperative events. It improves understanding of ocular biomechanics and neuro-ophthalmic function.
- Helps characterise subtle movement disorders
- Provides objective metrics for treatment outcomes
- May inform design of contact lenses and dry eye therapies
- Use in routine practice is limited by cost and complexity
