The bottom number is the distance at which a person with normal eyesight can read the same line. Twenty feet away, you can read letters most people see from 30 feet. Is your child old enough to cooperate with using an eye chart? If so, the American Academy of Ophthalmology recommends you have your child's vision tested. It may decrease slightly as people reach their 60s or 70s. When you reach middle age, your visual acuity will likely not change.
But you may lose your near vision. There are many types of contact lenses, each with its own advantages and disadvantages. Learn more about each type with our side by side comparison. Your environment can heavily impact your contact lenses and eyes. Learn more about about your environment's effect on your contact lenses. Forgot username or password?
You do not have access to this content. Join the AOA today! Vision and Vision Correction. Will clarity of vision vary with distance? Find a Doctor of Optometry. American Journal of Optometry and Physiological Optics. DOI: Repeatability of visual acuity measurement. Rabbetts, R. Validity and reliability of visual acuity measurements. Ophthalmic and Physiological Optics , 9 4 , Melody Huang, O. Melody Huang is an optometrist and freelance health writer.
Through her writing, Dr. Huang enjoys educating patients on how to lead healthier and happier lives. She also has an interest in Eastern medicine practices and learning about integrative medicine. Huang loves reviewing new skin care products, trying interesting food recipes, or hanging with her adopted cats. Michael Bayba earned his B. Upon graduating, he began researching, writing, and editing full-time. His passion for promoting health and healing in communities around the world has led him to create evidence-based and research-backed content on vision and other health topics.
His mission is to help individuals find quality and affordable treatment so they can live a healthy life. Medical reviewer: Dr. The information provided on VisionCenter. All about Vision Center Menu. Other Links Menu. In the U. The first step to maximizing the clarity and comfort of your vision is to see a qualified optometrist or ophthalmologist for a comprehensive eye exam.
American Academy of Ophthalmology. January
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