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.

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.

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.

Healthy myopic people between 18 and 50 years of age