Prescription Sunglasses Fitting Guide

Prescription sunglasses fitting hinges on visual acuity, wearing comfort, and compliance with International Optometric Standards.
Below is a streamlined, professional guide integrating core recommendations and mandatory requirements.

Core Rx Recommendations

≤-1.00D CYL Provide axis data (tolerance ±5°) to avoid double vision.

Provide optometry data from the past 3 months (SPH, CYL, Axis) to ensure accuracy.

Full data set (name, date, PD, SPH, CYL, Axis) with ±0.25D tolerance (for >600°).

Special Patient Groups

Myopia + Hyperopia/Presbyopia (40+ years): 1-month-old Rx data; 1-3 days adaptation period.

Pediatric Patients (8-16 years): ≤-4.00D SPH only; 1.60 refractive index; 6-month vision re-evaluation.

High Astigmatism (CYL >-2.50): 1.67 refractive index lenses; corneal curvature assessment (±2° tolerance).

International Optometric Standards

Certified optometrists must issue Rx data; an unqualified Rx is invalid.

Tolerance: SPH ±0.50D (>-6.00D: ±0.25D); CYL axis ±3°.

Lenses must be labeled with refractive index, power range, and intended users.