Patient interactive fit tool and methodology for contact lens fitting
An interactive fit tool and methodology which may be utilized by an eye care professional to improve the efficiency and final outcome in selecting a pair of contact lenses targeted towards a specific patient visual need in the treatment of presbyopia. The interactive fit tool comprises an application which includes images that would allow a patient to decide if he or she desires balanced visual acuity, near biased visual acuity, or distance biased visual acuity. In addition, the interactive fit tool comprises fit guide tables and performs the calculations for vertex distance and spherical equivalent.
1. An interactive fit tool for optimizing contact lens selection for individuals with presbyopia based upon refraction and eye dominance data along with patient feedback on preferred vision, the fit tool comprising:
a collection of images, each including a single scene composed of elements that demonstrates a range in visual quality over a range of distances to be presented to a patient as a single scene, wherein the collection of images comprises a first scene illustrating substantially equal visual acuity for near, intermediate and distance such that all elements appear in equal focus, a second scene illustrating enhanced visual acuity for distance, lessened visual acuity for near and a visual acuity between the distance and near for intermediate such that the near elements are less in focus than the distance elements, and a third scene illustrating enhanced visual acuity for near, lessened visual acuity for distance and a visual acuity between the near and distance for intermediate such that the near elements are more in focus than the distance elements, the first, second and third scenes being presented one at a time for viewing by a patient with both eyes seeing the same image;
multiple fit guides each comprising suggested contact lens pairs based upon patient need and patient preference, the multiple fit guides coordinated to the collection of images, wherein each comprise pairs of contact lenses having a range of powers and ADD values that provide vision correction corresponding to the preference for one of the first, second and third scenes; and
a means for calculating vertex distance and the spherical equivalent for a patient.
2. The interactive fit tool according to claim 1 , further comprising an electronic device having a data processor for making calculations, memory for storing data and images, and a means for data entry and display.
3. The interactive fit tool according to claim 2 , wherein the means for calculating vertex distance and the spherical equivalent for a patient comprises an algorithm implemented via the data processor.
4. The interactive fit tool according to claim 2 , wherein the electronic device comprises a lap top computer.
5. The interactive fit tool according to claim 2 , wherein the electronic device comprises a tablet.
6. The interactive fit tool according to claim 2 , wherein the electronic device comprises a smart phone.
7. A method for optimizing contact lens selection for individuals with presbyopia based upon refraction and eye dominance data along with patient feedback on preferred vision, the method comprising the steps of:
(a) presenting a collection of images which demonstrate a range in visual quality over a range of distances to a patient, each including a single scene composed of elements that demonstrates a range in visual quality over a range of distances to be presented to a patient as a single scene, wherein the collection of images comprises a first scene illustrating substantially equal visual acuity for near, intermediate and distance such that all elements appear in equal focus, a second scene illustrating enhanced visual acuity for distance, lessened visual acuity for near and a visual acuity between the distance and near for intermediate such that the near elements are less in focus than the distance elements, and a third scene illustrating enhanced visual acuity for near, lessened visual acuity for distance and a visual acuity between the near and distance for intermediate such that the near elements are more in focus than the distance elements, the first, second and third scenes being presented one at a time for viewing by a patient with both eyes seeing the same image;
(b) selecting a set of contact lenses from a fit guide based upon the best spherical equivalent refraction and ADD power for both eyes of the patient based upon patient preferences as determined from the collection of images;
(c) assessing the patient's vision; and
(d) repeating steps a-c until the patient's vision is acceptable to the patient.