Authors Subjects (mean age) Thermotracer used (specification) Ocular surface marking and OST acquisition OST indices studied Static/dynamic (time upon eye opening) Morgan et al. [3 ] 1 D (66 yo) IR thermographer NEC6T62 (Sensitivity 0.1°C Freq: 1 frame/s Resolution: 10 × 10 pixels) — RTD Static Morgan et al. [11 ] 36 D (58 yo) 27 C (57 yo) IR thermographer NEC6T62 (Sensitivity 0.1°C Freq: 1 frame/s Resolution: 10 × 10 pixels) Five 10 × 10 pixels placed in 5 anatomical locations along horizontal meridian running across centre cornea MOST RTD Static Morgan et al. [12 ] 11 D (50 yo) 7 C (53 yo) IR thermographer NEC6T62 (Sensitivity 0.1°C Freq: 1 frame/s Resolution: 10 × 10 pixels) 4 mm2 area at the centre of cornea GCC Dynamic (7 s) Fujishima et al. [13 ] 20 D (37.9 yo) 20 C (35.1 yo) IR radiation thermometer THI-500 (Sensitivity: 0.1°C Freq: 1 frame/s) Central cornea GCC Static and dynamic (10 s) Mori et al. [14 ] 13 D (45.5 yo) 7 C (33.6 yo) Thermal Vision Laird 3 (Nikon) (Sensitivity: 0.15°C Freq: 60 frames/s) 20 × 20 pixel box at central cornea valueDynamic (more than 10 s) Craig et al. [8 ] 8 D (60.3 yo) 13 C (24.8 yo) IR thermographer NEC6T62 (Sensitivity 0.1°C Freq: 1 frame/s Resolution: 10 × 10 pixels) Mean of central cornea pixels GCC TVF Static Zelichowska et al. [15 ] 9 D 13 C IR radiation thermographer Central cornea GCC Static and dynamic (15 s) Singh and Bhinder [16 ] 51 D (35.36 yo) 51 C (35.36 yo) IR and remote heat sensor thermometry (Sensitivity 0.1°C) Closed and open eye temperature for 5 s MOST Static Kamao et al. [17 ] 30 D (52.9 yo) 30 C (42.7 yo) Tomey IR thermographer (Sensitivity 0.1°C Freq: 6 frame/s Resolution: 320 × 240 pixels) Central cornea (GCC) 4 mm in diameter, CT and CN (both 2 mm in diameter) GCC CN CT Static and dynamic (10 s) Su et al. [18 ] 76 D (49 yo) 47 C (34 yo) Microbolometer sensor (Sensitivity 0.1°C Freq: 30 frame/s Resolution: 320 × 240 pixels) ROI (region of interest) determined by four curves connected between four manually set apexes (top and bottom of the eye, left and right corners of the eye) TDV CV Dynamic (6 s) Kottaiyan et al. [19 ] — Thermovision A40 (Sensitivity 0.08°C Freq: 30 frame/s Resolution: 320 × 240 pixels) Central corneal — Dynamic (5 s) Azharuddin et al. [20 ] 42 D (35.2 yo) 36C (28.4 yo) FLIR SC305 (Sensitivity < 0.05°C Freq: 9 frame/s Resolution: 320 × 240 pixels) Cornea — Dynamic (15 s) Zhang et al. [21 ] 20 D (55.8 yo) (5 ADDE) (15 MGD) FLIR SC325 (Sensitivity < 0.05°C Freq: 30 frame/s Resolution: 320 × 240 pixels) Central cornea 7~9 mm circular — Dynamic (5 s) Versura et al. [22 ] 24 D (52 yo) 15 C (43 yo) Tomey TG 1000 Central cornea 4 mm circular CCT Static