Clinical evaluation of accommodation and ocular surface stability relavant to visual asthenopia with 3D displays

BMC Ophthalmology

Table 1 Results of ocular factors before and after 3D and 2D viewing

Factors	Baseline	Post-3D	P value*	Post-2D	P value^†	P value^‡
NPA^§(cm)	10.75 ± 1.86	11.52 ± 1.53	0.005	9.95 ± 2.51	0.167	0.004
OQAS^\|\| (diopters)	2.35 ± 0.38	2.0 ± 0.46	0.003	2.32 ± 0.47	0.666	0.037
TBUT^#(sec)	7.33 ± 1.68	7.60 ± 1.12	0.604	7.67 ± 1.54	0.672	0.923
IBI^¶(sec)	3.84 ± 0.90	5.54 ± 0.87	0.001	4.52 ± 0.54	0.027	0.005
OPI^††	2.0 ± 0.61	1.39 ± 0.22	0.006	1.72 ± 0.40	0.140	0.017
SUM^**	0.80 ± 0.94	5.67 ± 5.45	0.003	2.07 ± 2.89	0.196	0.004

NPA^§, near point of accommodation; OQAS^||, accommodative power calculated using the optical quality analysis system; TBUT^#, tear break-up time; IBI^¶, interblink interval; OPI^††, ocular protection index; SUM^**, total ocular symptom score.
P value*, Comparison between ophthalmologic factors of post-3D and Baseline.
P value^†, Comparison between ophthalmologic factors of post-2D and Baseline.
P value^‡, Comparison between ophthalmologic factors of post-3D and post-2D.

ISSN: 1471-2415