Ocular surface temperature measurement in diabetic retinopathy

Area of Science:

• Ophthalmology
• Medical Imaging
• Biomedical Engineering

Background:

• Infrared thermography offers functional imaging by visualizing temperature patterns related to blood flow.
• Ocular thermography has potential applications in diagnosing various eye conditions.

Purpose of the Study:

• To explore the diagnostic utility of ocular thermography for diabetic retinopathy.
• To investigate the correlation between ocular surface temperature (OST) and the presence/severity of diabetic retinopathy.

Main Methods:

• Infrared imaging was used to obtain ocular thermograms from normal subjects, non-proliferative diabetic retinopathy (NPDR) patients, and proliferative diabetic retinopathy (PDR) patients.
• Ocular surface temperature (OST) and its changes after eye dilation were analyzed at various points of interest.
• Statistical analyses were performed to determine the significance of OST differences between groups.

Main Results:

• Normal subjects showed higher OST compared to NPDR and PDR patients.
• NPDR and PDR patients exhibited significantly lower corneal and conjunctival temperatures than age-matched controls.
• Eye dilation caused an increase in OST for all groups, but the magnitude of increase was less pronounced in diabetic retinopathy patients.

Conclusions:

• Ocular surface temperature variations, particularly the reduced temperature and altered response to dilation in diabetic retinopathy patients, can serve as a functional marker for diagnosis.
• Ocular thermography presents a promising, non-invasive method for detecting and potentially grading diabetic retinopathy.