This clinical study wants to understand how blurred images look to young adults.

The main question is: How do different kinds of images and different kinds of blur change the way people think those images look? Participants will get an eye exam, then look at several blurred images and rate how good or bad each one looks on a quality scale from 1 (very bad) to 10 (very good).

Inclusion Criteria:

• Distance refractive error (equivalent sphere) between -7 D and +5 D
• Astigmatism below 4D
• Minimum corrected visual acuity: 10/10

Exclusion Criteria:

• Aphakic or pseudophakic eye surgery
• Reported systemic pathology that affects vision
• Medical treatment or taking medications that affect vision
• Severe ocular pathology declared, involving a loss of visual field as in glaucoma, a loss of acuity
• Reported neurological deficit, including a history of seizure or sensorimotor coordination disorders, vestibular or cerebellar pathology
• Binocular vision problems such as amblyopia, strabismus, or double vision