| 摘要 |
FIELD: physics.SUBSTANCE: each lens of the set, kit or stock has a central optical axis and a central optical zone having a corrective refractive power from weak refraction to -6.0D, and a peripheral optical zone surrounding said central zone. The peripheral zone is characterised by an incident angle with respect to the optical axis of about 30 degrees; the peripheral zone of each lens has a positive refractive power relative to the refractive power of the central zone of that lens to thereby provide myopic peripheral defocus not greater than 3.5D. Also the lenses of the set, kit or stock are arranged in an orderly manner such that a doctor is able to select a lens with corrective power to provide or procure a lens to inhibit progression of myopia without needing to first measure peripheral refractive error in the eye and to order a lens with customised peripheral power.EFFECT: design of a set, kit or stock of lenses which are efficient during use and which do not require a doctor to measure peripheral refractive error of the eyes of a myopic patient.36 cl, 27 dwg |
