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. 2022 Sep 27;16:3165–3174. doi: 10.2147/OPTH.S377541

Table 2.

Frequency and Weighted Arithmetic Means and Standard Deviations of Symptoms Associated with Asthenopia

No Question Never Mild Moderate e Severe Very Severe Mean± SD Direction On
Q1 Headache associated with work 277(35.33) 253(32.27) 165(21.05) 80(10.2) 9 (1.15) 2.10±1.03 Mild
Q2 Headache associated with far vision 426(54.34) 171(21.81) 114(14.54) 61(7.78) 12(1.53) 1.80±1.05 Never
Q3 Eye fatigue associated with work 194(24.74) 224(28.57) 212(27.04) 122(15.56) 32(4.08) 2.46±1.14 Mild
Q4 Eye fatigue associated with far vision 355(45.28) 191(24.36) 125(15.94) 96(12.24) 17(2.17) 2.02±1.14 Mild
Q5 Blurred vision at near distance 453(57.78) 142(18.11) 86(10.97) 75(9.57) 28(3.57) 1.83±1.17 Mild
Q6 Blurred vision at far distance 332(42.35) 170(21.68) 122(15.56) 110(14.03) 50(6.38) 2.20±1.29 Mild
Q7 Tearing while working 371(47.32) 196(25) 132(16.84) 61(7.78) 24(3.06) 1.94±1.11 Mild
Q8 Tearing eyes at far vision 472(60.2) 154(19.64) 105(13.39) 43(5.48) 10(1.28) 1.68±0.98 Never
Q9 Double vision 486(61.99) 156(19.9) 92(11.73) 37(4.72) 13(1.66) 1.64±0.97 Never
Q10 Double vision associated with far vision 485(61.86) 139(17.73) 99(12.63) 42(5.36) 19(2.42) 1.69±1.04 Never
Q11 Flashes of light 357(45.54) 217(27.68) 120(15.31) 62(7.91) 28(3.57) 1.96±1.12 Mild
Q12 Eye strain while working 231(29.46) 236(30.1) 159(20.28) 117(14.92) 41(5.23) 2.36±1.20 Mild
Q13 Eyestrain with far vision 366(46.68) 169(21.56) 132(16.84) 83(10.59) 34(4.34) 2.04±1.20 Mild
Q14 Redness around eye 389(49.62) 186(23.72) 128(16.33) 60(7.65) 21(2.68) 1.90±1.10 Mild
Q15 Eye pain while working 311(39.67) 215(27.42) 152(19.39) 78(9.95) 28(3.57) 2.10±1.14 Mild
Q16 Eye pain with far vision 443(56.51) 156(19.9) 110(14.03) 50(6.38) 25(3.19) 1.80±1.10 Never
Q17 Difficulty tracking objects during reading/working 369(47.07) 196 (25) 130(16.58) 65(8.29) 24(3.06) 1.95±1.12 Mild
Q18 Difficulty tracking objects with far vision 364(46.43) 174(22.19) 120(15.31) 84(10.71) 42(5.36) 2.06±1.24 Mild
Q19 Eye burning sensation while working 357(45.54) 183(23.34) 117(14.92) 92(11.73) 35(4.46) 2.06±1.21 Mild
Q20 Eye burning sensation with far vision 441(56.25) 149(19.01) 109(13.9) 60(7.65) 25(3.19) 1.83±1.13 Mild
Overall 1.97±0.84 Mild