Comparison of visual field in healthy eyes with surgical mask usage in different ways
- Conditions
- The coronavirus disease pandemic has greatly affected our way of life and health system. The use of face masks can reduce the spread of the virus. Wearing a mask that is improperly fitted to the face reportedly results in inferior visual field artifacts. However, the effect of wearing a properly fitted face mask remains unclear.Surgical mask, visual field, COVID-19
- Registration Number
- TCTR20230802001
- Lead Sponsor
- Faculty of Medicine, Srinakharinwirot University
- Brief Summary
o statistically significant differences in sensitivity were observed between the two groups at any time point. Fogging was observed in eight participants (22.2%) due to placing the mask immediately over the nose and mouth (without adhesive tape), and downward-displacement of the surgical mask was observed in eight participants (22.2%); however, no significant difference in sensitivity between the two subgroups was observed.
- Detailed Description
Not available
Recruitment & Eligibility
- Status
- Completed
- Sex
- All
- Target Recruitment
- 36
1.a best-corrected visual acuity (BCVA) of at least 20/30 (snellen notation)
2. refraction of at least minus 6 diopters
3. intraocular pressure (IOP) within the normal range (21 mmHg)
4.normal slit-lamp examination results; no abnormalities of the optic disc or signs of glaucoma in fundus photography (C:D ratio more than 0.5, focal or diffuse loss of neuroretinal rim or notching or retinal nerve fiber layer defects, disc hemorrhage compatible with glaucoma)
5.no history glaucoma or family history of glaucoma
6. no history of undergoing intraocular or laser surgery in the best eye
7. and no history of receiving medications such as hydroxychloroquine, chloroquine, phenothiazines, pentosan polysulfate sodium (PPS), antituberculosis medications (ethambutol), deferoxamine, talc, or tamoxifen continuously, which may result in damage to the macula or optic nerve.
1.abnormalities of the macula, optic disc, and retinal nerve fiber layer detected on optical coherence tomography (OCT)
2. inability to complete all three consecutive visual field tests
3.and fixation loss of > 25% , false positive >15% , or false negative >15%.
Study & Design
- Study Type
- Interventional
- Study Design
- Not specified
- Primary Outcome Measures
Name Time Method sensitivity of visual field at the end of visual field test The independent t-test was used to compare sensitivity when the data were normally distributed. The Mann Whitney U test was used when the data had different distributions
- Secondary Outcome Measures
Name Time Method /A N/A N/A