TABLE 1.

Inclusion criteria

Age	• 5–18 y old at treatment onset
Refractive error	• Spherical equivalent myopia ≥−0.50 and ≤−6.00 D* • With-the-rule astigmatism (axes, 180 ± 30) ≤1.75 D*
Keratometry	• Flat K >37.00 D • Flat K (refractive correction) >36.00 D
Visual acuity	• Best-corrected visual acuity 20/20 or better
Ocular health	• Intraocular pressure ≤21 mmHg • No ocular diseases, including keratoconus (confirmed via pre-treatment corneal topography)
Other	• No systemic diseases • No history of OK or contact lens wear • No concurrent use of atropine

*Indications for fitting Paragon CRT lenses. K = keratometry; OK = orthokeratology.