Galindo-Romero et al. Optometry and Vision Science, November 2021
Appendix 1. Questionnaire I: General information
1.Age:____________________
2.Gender:
a. Male b. Female 3.Level of studies:
a. High school graduates
b. Undergraduate university students c. Postgraduate (degree or master) d. Doctorate
e. Others
4.Optical correction:
a. Spectacles b. Contact lenses c. Both
d. None
5.Use of optical correction:
a. Both near and distance vision b. Only near vision
c. Don´t use
II: Usage habits of electronic devices during the lockdown 1.What was your main activity during lockdown?
a. Studying from home b. Remote working
c. Working outside home as always d. Others: ____________________
Galindo-Romero et al. Optometry and Vision Science, November 2021
2. How many hours per day do you use each electronic device during the lockdown?
Hours per day
Electronic device 0 (don´t use) 1 2 3 4 5 6 7 8 9 10 Smartphone
Tablet Computer TV
3.How far from your eyes do you use each electronic device?
Viewing distance (cm)
Electronic device <10 10-25 25-40 > 40 Don´t use Smartphone
Tablet
4.What kind of electronic device do you use for your primary activity?
a. Smartphone b. Tablet c. Computer d. None
5. Comparing to before lockdown, how many more hours per day do you think you use more the electronic devices during the lockdown?
Hours of daily increase 0 (no increased) 1 2 3 4 5 6 7 8 9 10
Galindo-Romero et al. Optometry and Vision Science, November 2021
III: Visual and ocular symptomatology and general ergonomics
1. Have you experienced any of the following ocular symptoms during the lockdown?
Yes No Irritation
Grittiness Burning Dry eye Tearing Blurred vision Fatigue Ocular pain Headache Double vision Sensitivity to light
2. How many hours per day do you spend in open spaces during the lockdown:
a. Don´t have access
b. Less than 30 min per day
c. Between 30 min and 1 hour per day d. Between 1 and 3 hours per day e. More than 3 hours per day
3. Do you have an appropriate workspace at home during the lockdown?
a. Yes b. No
c. Neither study nor work
4. Do you have a good lighting in your workspace at home during the lockdown?
a. Yes b. No
c. Neither study nor work
5. How do you perceive your ocular symptomatology during the lockdown?
a. Equal than before lockdown b. Worse than before lockdown
