Effect of overnight wear of the Triggerfish® sensor on corneal thickness measured by Visante® anterior segment optical coherence tomography

Purpose To evaluate the effect of overnight wear of the Triggerfish® contact lens sensor (CLS) on central corneal thickness (CCT) using the Visante® anterior segment optical coherence tomography (AS‐OCT). Methods Twelve healthy subjects were studied in a sleep laboratory. An ophthalmic examination including ultrasonic CCT, corneal topography, specular microscopy and AS‐OCT CCT was performed. Starting at 7 pm, the Triggerfish® CLS was fitted on one randomly selected eye. Similar AS‐OCT measurements were taken on both eyes every 2 hr from 8 pm to 8 am. The CLS was removed just after the 8 am measurement session. Measurements were repeated at 9 am. Results Twenty‐four eyes of 12 subjects were studied (mean age, 22.1 ± 2.4 years; four men/eight women). CCT significantly increased during the night in both CLS and control eyes (p