Thermography records infrared radiation emitted from the body surface to map temperature distribution. In ophthalmology it has been explored for assessing ocular surface and periocular blood flow.
Technique
Infrared cameras capture temperature patterns across the face and eyes without direct contact. Images may be taken at rest or during specific stimuli, such as blinking or tear evaporation.
- Non-invasive and does not require contrast agents
- Sensitive to small temperature differences
- Requires controlled environmental conditions for reliable results
- Data can be displayed as colour-coded temperature maps
Potential Applications
Thermography has been investigated in dry eye disease, inflammation, and vascular disorders by identifying abnormal heat patterns. Its use remains largely research-based, with limited routine clinical deployment.
- May help quantify evaporative loss or inflammatory activity
- Could support monitoring of treatment responses
- Standardisation and validation are needed for wider adoption
- Interpretation must consider systemic and environmental influences on temperature
