Clinical Study to Evaluate Effectiveness of Digital Refraction

A digital refraction tool is a device meant to measure visual acuity and to subjectively
measure refractive value for a patient's eye for the conditions of myopia and astigmatism. It
is intended for adults aged 22 to 55 years that have no prior correction with up to 3.00
diopters (D) of myopia and up to 2.00 D of astigmatism, or those with prior correction up to
10.00 D of myopia and require an over-refraction of no more than 2.75 D.

LogMAR (ETDRS) chart to measure visual acuity.

The manual manifest refraction is performed by an eyecare specialist using a phoropter.

The LogMAR Visual Acuity chart is used to measure visual acuity. The manual refraction will
be used in this study for obtaining the refractive error of each eye.

Inclusion Criteria:

1. Subject must be between 22 and 55 years of age at the time of consent.

2. Subject must have a refractive error

1. With no greater than -3.00 D myopia and -2.00 D astigmatism in either eye.

2. With prior correction of no greater than -10.00 D myopia and requiring
over-refraction of no more than 2.75 D in either eye.

5. Subjects with Best Corrected Visual Acuity (BCVA) of 20/32 or better.

Exclusion Criteria:

1. Subjects with diabetes mellitus.

2. Subjects using ophthalmic or systemic corticosteroids.

3. Subjects with autoimmune conditions.

4. Subjects with active corneal or conjunctival infection.

5. Subjects with active corneal, conjunctival, or intraocular inflammation (ie, uveitis).

6. Subjects with diabetic retinopathy.

7. Subjects with glaucoma or ocular hypertension.

8. Subjects with macular degeneration.

9. Subjects with previous ocular surgery.

10. Subjects on antihyperglycemic agents; corticosteroids; hydroxychloroquine (Plaquenil)
and chloroquine (Aralen); tamoxifen (Nolvadex).

11. Pregnancy

12. Subjects who, in the judgment of the Investigator, may be inappropriate for the
intended study procedures.