Myopia, Refractive Errors
Conditions
Brief summary
A prospective, self-control, double-blind design was conducted in Tianjin. Two hundred participants were assigned to wear two kinds of spectacle glasses. To examine the effect of free-toroidal design and aspherical lens on the subjective visual quality among the myopic population.
Detailed description
A prospective, self-control, double-blind design was conducted in Tianjin. Two hundred participants were assigned to wear two kinds of spectacle glasses. To examine the effect of free-toroidal design and aspherical lens on the subjective visual quality among the myopic population. The subjective visual quality of clarity and comfort were determined using a questionnaire when first wearing the glasses and after 1week.
Interventions
OTHERThe free-toroidal design lenses
Participants were asked to wear the new design lenses (the free-toroidal design lenses) for 1 week
Sponsors
Tianjin Eye Hospital
Study design
Observational model
OTHER
Time perspective
PROSPECTIVE
Eligibility
Sex/Gender
ALL
Age
18 Years to 50 Years
Inclusion criteria
* health volunteers * their spherical refraction from -0.50 to -8.00 Diopter, with the cylinder diopter less than -3.00 Diopter * best corrected visual acuity (BCVA)≥ 20/20 in both eyes * stable refraction (no change greater than 0.5 Diopter within two years)
Exclusion criteria
* if they had Aphakic or intraocular lens eyes, had a history of trauma, active eye disease or ocular surgery, serious systemic diseases, or had a wearing history of corneal contact lenses.
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| The clarity score | baseline visit time | The clarity score by a questionnaire,scores on the questionnaire range from 1 to 6, with higher scores being better |
| The comfort score | baseline visit time | The comfort score by a questionnaire,scores on the questionnaire range from 1 to 6, with higher scores being better |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Accuracy of foveal and peripheral visual acuity | baseline visit time | Accuracy of foveal and peripheral visual acuity was assessed by the eye movement tracking device |
Countries
China
Outcome results
None listed