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. Author manuscript; available in PMC: 2009 Dec 1.
Published in final edited form as: Am J Ophthalmol. 2008 Aug 23;146(6):920–924. doi: 10.1016/j.ajo.2008.06.020

Figure 3. Changes of tear volumes measured by OCT.

Figure 3

(Right) Blinking caused tear loss from total tear volume (TTV) and lower tear meniscus volume (LTMV) immediately after instillation of the artificial tears (P<0.05). In contrast, it caused the tear gain in the TFV after the instillation (P<0.05). (Middle) After the open eye period, LTMV gained volume immediately after instillation (P<0.05). TFV lost volume significantly (P<0.05) immediately after instillation. (Left) For the entire blink cycle, net loss was evident in tear film volume (TFV), LTMV, and TTV immediately after the instillation (P<0.05). Five minutes after the instillation, no significant differences in the tear menisci and film volumes were detected. Red asterisks denote to significance differences at 0.05 levels and vertical bars denote 95% confidence intervals.

UTMV: Upper tear meniscus volume.

TFV: Tear film volume;

LTMV: Lower tear meniscus volume;

TTV: Total tear volume.