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Z. Wu, C. Begley, H. Liu, N. L. Himebaugh; Blinking Patterns and Associated Ocular Sensations Under Different Conditions. Invest. Ophthalmol. Vis. Sci. 2010;51(13):2384.
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© ARVO (1962-2015); The Authors (2016-present)
This pilot study examined ocular surface sensations, blinking and tear stability while varying tasks and ocular stimuli to determine whether moderate stimuli altered ocular surface sensation and blinking patterns.
During 3 visits, 5 subjects (4 males, 1 female) had sodium fluorescein instilled, and played a computer game and listened to music for 2 min with either no stimuli (NS), artificial tears (AT) or a small fan (FS) blowing on the eye. Subjects recorded ocular and blinking sensations on visual analogue scales (VAS). Two cameras recorded blinking and tear stability and custom MATLAB programs analyzed blink parameters, including interblink interval (IBI), blink amplitude (BA), and the area of tear break-up (TBU).
The AVG (±STD) IBI with NS was 6.1±2.8 (music) and 8.8±6.8 (game), AT was 5.9±2.0 (music) and 11.9 ±12.3 (game), and FS was 3.3±1.1 (music), and 14.5±25.4 (game); the IBI tended to increase with the game and become more irregular (pulsed) with the game and fan. The BA% with NS was 60±16 (music) and 49±8.6 (game), AT was 62±18 (music) and 45 ±20 (game), and FS was 65±22 (music), and 56±39 (game); with the BA significantly less during the NS game compared to AT music (p<0.05, paired t-test). The TBU% with NS was 15±4 (music) and 22±7 (game), AT was 21±14 (music) and 16 ±3 (game), and FS was 18±12 (music), and 17±6 (game). Irritation and stinging was significantly decreased (p<0.05, paired t-test ) with the AT music compared to FS game; lubrication and watering during the blink showed similar trends.
Our results suggest that using these relatively moderate ocular surface stimuli (AT to decrease and FS to increase ocular surface stimulation) affected both surface sensation and blinking patterns, thus allowing study of the effect of external or ocular surface controls on blinking.
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