Table 6. Effect of online learning on eye health based on teachers’ demographic data, teaching data, and position.

Factors	Effect of online teaching using computer/tablet/phone on your eye health						p-value
	Severe effect		Moderate effect		No effect
	No	%	No	%	No	%
Age in years							.001*
22-35	1	2.6%	23	60.5%	14	36.8%
36-50	74	32.3%	119	52.0%	36	15.7%
51-60	9	26.5%	19	55.9%	6	17.6%
Gender							.001*
Male	11	14.9%	35	47.3%	28	37.8%
Female	73	32.2%	126	55.5%	28	12.3%
Had chronic health problems?							.175
Yes	23	28.8%	37	46.3%	20	25.0%
No	61	27.6%	124	56.1%	36	16.3%
Daily hours spent on online teaching before the COVID pandemic							.005*
1 hour	12	30.8%	23	59.0%	4	10.3%
2-5 hours	11	14.7%	40	53.3%	24	32.0%
> 5 hours	19	40.4%	22	46.8%	6	12.8%
Not used	42	30.0%	76	54.3%	22	15.7%
Daily hours spent on online teaching after the COVID pandemic							.003*$
1 hour	3	25.0%	6	50.0%	3	25.0%
2-5 hours	38	20.8%	103	56.3%	42	23.0%
> 5 hours	43	40.6%	52	49.1%	11	10.4%
The distance between you and the digital screen display while using the device							.082$
< 50 cm	54	34.0%	80	50.3%	25	15.7%
50 cm	29	22.3%	74	56.9%	27	20.8%
> 50 cm	1	8.3%	7	58.3%	4	33.3%
Screen brightness while using the device							.170$
Low	3	15.8%	11	57.9%	5	26.3%
Normal	63	27.8%	116	51.1%	48	21.1%
High	14	33.3%	26	61.9%	2	4.8%
Very high	4	30.8%	8	61.5%	1	7.7%
The position of the eyes toward the screen							.648
Down a little	28	32.2%	42	48.3%	17	19.5%
Straight ahead	53	25.6%	116	56.0%	38	18.4%
A little higher	3	42.9%	3	42.9%	1	14.3%
Have you ever visited an ophthalmologist?							.004*
Yes	60	34.7%	88	50.9%	25	14.5%
No	24	18.8%	73	57.0%	31	24.2%
Have you ever used moistening eye drops?							.847
Yes	10	20.8%	31	64.6%	7	14.6%
No	10	22.7%	26	59.1%	8	18.2%
Have you ever had eye surgery?							.273$
LASIK	14	26.9%	29	55.8%	9	17.3%
Others	1	11.1%	8	88.9%	0	0.0%
No	69	28.8%	124	51.7%	47	19.6%