Correction of higher order aberrations in intraocular lenses
View Patent ↗In one aspect, the present invention provides a method of designing an intraocular lens (IOL) to address variations of at least one ocular parameter in a population of patient eyes. The method can include establishing at least one eye model in which the ocular parameter can be varied over a range exhibited by the population. The eye model can be employed to evaluate a plurality of IOL designs in correcting visual acuity for eyes in the patient population. An IOL design that provides a best fit for visual performance over at least a portion of the parameter range can then be selected.
1. A method of manufacturing an ophthalmic lens, comprising
establishing a model eye that incorporates a plurality of ophthalmic lens designs,
determining a modulation transfer function (MTF) at a retinal plane of said model eye,
utilizing at least one MTF value corresponding to a low spatial frequency to evaluate a contrast sensitivity of said model eye;
selecting the ophthalmic lens design with the highest contrast sensitivity; and
manufacturing at least one ophthalmic lens according to the selected ophthalmic lens design.
2. The method of claim 1 , wherein said low spatial frequency is less than about 60 lp/mm (˜18 cycles/degree).
3. The method of claim 2 , wherein said low spatial frequency lies in a range of about 5 to about 60 lp/mm (˜1.5 to 18 cycles/degree).
4. The method of claim 1 , further comprising utilizing at least one MTF value corresponding to a high spatial frequency to evaluate visual acuity of said model eye.
5. The method of claim 4 , wherein said high spatial frequency is greater than about 60 lp/mm (˜18 cycles/degree).
6. The method of claim 5 , wherein said high spatial frequency is in a range of about 60 to about 100 lp/mm (˜18 to 30 cycles/degree).
7. The method of claim 1 , wherein said ophthalmic lens comprises an intraocular lens.
8. A method of manufacturing an ophthalmic lens, comprising
establishing a model eye that incorporates a plurality of ophthalmic lens designs,
determining a modulation transfer function (MTF) at a retinal plane of the model eye,
utilizing at least one MTF value corresponding to a high spatial frequency to evaluate a visual acuity of said model eye,
selecting the ophthalmic lens design with the highest visual acuity; and
manufacturing at least one ophthalmic lens according to the selected ophthalmic lens design.
9. The method of claim 8 , wherein said high spatial frequency is greater than about 60 lp/mm (˜18 cycles/degree).
10. The method of claim 9 , wherein said high spatial frequency is in a range of about 60 to about 100 lp/mm (˜18 to 30 cycles/degree).