Customized lenses
The invention relates to a method of customizing lenses using an external stimulus such as light. Fine-tuning of the lens to match the precise optical requirements using the same lens is also possible. The lenses are self-contained and do not require the addition or removal of significant portions of the lens to achieve customization.
1. A method for customizing a lens post fabrication comprising:
a) conducting an examination of a patient to determine the optical properties required for the lens;
b) selecting a lens, said lens capable of post manufacture modification by exposure to an external energy source;
c) exposing at least a portion of the lens to induce changes in the optical properties of the lens to match the optical properties required for the lens;
d) exposing the entire lens to an external energy source to lock in the induced changes in the optical properties of the lens;
e) dispensing the lens to the patient.
2. The method of claim 1 wherein said lens comprises a modifying composition dispersed within the lens, the modifying composition capable of stimulus induced polymerization.
3. The method of claim 1 further comprising the step of re-exposing at least a portion of the lens to an external energy source at least once to induce further changes in the optical properties of the lens.
4. The method of claim 1 wherein the modifying composition comprises at least one photopolymerizable moiety.
5. The method of claim 1 wherein the external energy source is light.
6. The method of claim 1 wherein the external energy source is ultraviolet light.
7. The method of claim 1 wherein the lens is a corrective lens for glasses.
8. The method of claim 1 wherein the lens is a contact lens.
9. The method of claim 1 wherein the lens comprises a first polymer matrix.
10. The method of claim 7 wherein the modifying composition comprises at least one photopolymerizable moiety.
11. The method of claim 7 wherein the external energy source is light.
12. The method of claim 7 wherein the external energy source is ultraviolet light.
13. A method for customizing a lens comprising the steps of:
a) determining the optical requirements of the lens;
b) selecting a lens, said lens comprising a modifying composition;
c) exposing at least a portion of the lens to an external energy source, thereby inducing changes in the optical properties of the lens;
d) measuring the optical properties of the lens;
e) re-exposing at least a portion of the lens to an external energy source inducing further changes in the optical properties of the lens;
f) repeating steps (d) and (e) until the measured optical properties of the lens match the optical requirements of the lens;
g) exposing the entire lens to an external energy source to lock-in the previous changes in the optical properties.
14. The method of claim 13 wherein the step of determining the optical requirements of the lens is accomplished by conducting an ophthalmologic examination of a patient.
15. The method of claim 13 wherein the lens is a corrective lens for glasses.
16. The method of claim 13 wherein the lens is a contact lens.