Ocular surface temperature measurements made using the Tomey TG 1000 in healthy subjects showed excellent intraobserver reproducibility. This novel non-invasive technique offers new options for increased understanding of the physiology of the ocular surface.

Aims: To investigate the ocular surface temperature gradient in eyes with bacterial corneal ulcers. Methods: Prospective examination of 12 eyes with bacterial corneal ulcers (group 1) and 12 control eyes (group 2). Infrared thermal imaging (Tomey TG 1000) was used to study the temperature of the ocular surface. The mean, minimum and maximum temperature of the ocular surface and temperature course over a time period of 10 s of sustained eye opening were evaluated. Furthermore, a correlation between the overall corneal temperature and the temperature at the base of the corneal ulcers was determined. Results: A significant difference between both groups was present. Mean corneal temperature was 35.6°C ± 0.9 in group 1 and 34.8°C ± 0.8 in group 2 (p = 0.033). The temperature course over 10 s of sustained eye opening was –0.6°C ± 0.4 in group 1 and –0.3°C ± 0.2 in group 2 (p = 0.045). There was a close correlation between the mean temperature at the base of the corneal ulcer and the overall corneal temperature (r = 0.92, p < 0.001). Conclusion: Infrared thermal imaging can be used to objectively determine the increased ocular surface temperature in patients with bacterial corneal ulcers. The use of dynamic thermography may offer new options to monitor ocular surface alterations.

Background: Large full-thickness eyelid defects are conventionally reconstructed by either a Hughes flap or Cutler-Beard bridge flap. Since the structure of the eyelid and its components are necessary for the tear film production and stability, we investigated the outcome after eyelid reconstruction focusing on dry eye symptoms using a new thermographic device, the TG-1000. Methods: Seventeen eyes of patients formerly treated with Hughes flaps (n = 16) and a Cutler-Beard bridge flap (n = 1) were compared to untreated healthy eyes (n = 17) regarding the functional and aesthetic outcome. The follow-up ranged from 3 to 63 months (mean 24.88 ± 17.86). Results: There was no significant difference in Schirmer’s test, break-up time and ocular surface temperature (p > 0.05) between patients after full-thickness eyelid reconstruction and a control group. Eleven patients had minor postoperative complications such as notching of the lid margin (11/17), epiphora (1/17), superficial punctate keratitis (6/17), trichiasis (2/17) and a mild tendency to eversion of the lid margin (6/17). More than 75% of the patients rated their postoperative aesthetic outcome as good or even excellent. Conclusion: The new TG-1000 device is a simple and quick tool for screening of dry eye. This study shows that tarsoconjunctival grafts offer good aesthetic and functional outcome with sufficient tear film composition and stability.