Determine Functions of Pinhole Glasses on the Eyes

Quantative Analysis of Functional Changes by the Pinhole Glasses

Pinhole glasses which is using pinhole effect may induce a functional change on the eyes, including Distance and near visual acuity(DVA, NVA), Pupil size, DOF, Accomodative amplitude, CS, Visual field(VF), Stereopsis.

Inclusion Criteria:

• Age : between 20 and 50 years old
• Visual acuity : correctable distant and near visual acuity by glasses up to 20/20
• Others : Normal intraocular pressure, optic discs with a healthy appearance, and normal ocular alignment.

Exclusion Criteria:

• History of systemic or topical medication that might affect accommodation
• Others : Corneal pathologic features, previous ocular surgery, glaucomatous optic discs, glaucoma, cataracts of grade II or greater, vitreous opacity, or retinal abnormalities that might limit the accuracy of test.