Table 1.
Temperature change of the cornea and upper eyelid in Japanese hot baths and IWCD use (mean (SD))
| Cornea (°C) | Upper eyelid (°C) | ||
| Normal volunteers (n = 5) | Room temperature (22.5°C) | 34.8 (0.9) | 35.0 (0.7) |
| In Japanese hot bath 5 minutes (water temperature, 41.5°C, bathroom temperature 26.4°C) | 38.4 (0.3) | 38.2 (0.5) | |
| IWCD 5 minutes | 37.9 (0.9) | 38.8 (0.7) | |
| MGD subjects (n = 3) | Room temperature (22.5°C) | 35.6 (0.8) | 35.8 (0.7) |
| IWCD 5 minutes | 38.2 (1.7) | 37.4 (0.9) | |
| Normal volunteers (n = 10) (data are from our previous report)10 | Room temperature (23.0°C) | 34.1 (1.2) | 34.1 (0.8) |
| IWCD 5 minutes | 36.1 (1.4) | 37.3 (1.2) |
IWCD = infrared warm compression device.
The temperature of the eye was measured using an infrared radiation thermometer (THI-500S, Tasco Japan, Osaka, Japan)26for 5 normal volunteers and 3 MGD subjects, and also compared to the data from our previous report.10 The typical water temperature of Japanese hot baths (usual home bath, not a hot spring) is around 42°C. The temperature of the cornea and upper eyelid were almost identical in both the Japanese hot baths and while using the IWCD, so the temperature change for 5 minutes of use of the IWCD was within the range of normal daily activities.