An optical prescription is an order that is written by either an ophthalmologist or an optometrist that specifies the formula that is needed to create corrective lenses that will correct a person’s vision problem. Optical prescriptions contain symbols (medical language codes). There are many codes that are on prescription. Each one represents a specific requirement for the optical prescription. If you’re experiencing vision problems, we recommend that you make an appointment with our Houston eye doctor at West U Vision to get an eye exam to determine if you need an optical prescription for corrective eyewear.
Corrective Lenses Houston
Many people don’t understand how to read their prescription. It’s a good idea for people to have a basic understanding of how to read it. When you come to our Houston eye doctor at West U Vision we will take the time to answer any questions you have. The basic symbols for an optical prescription include: The “sph box” (sphere)-amount of long or short sight that’s present (Plus signs indicate long sight, minus signs indicate short sight), The “Near VA” code- the smallest sized print that can be read with the prescription (usually written with the letter ”N” with a number after it), The “cl” box shows how much astigmatism is present, the “axis” tells the angle that the lens must be placed at when fit into the frame (ranges from 0-180 degrees), the “prism” is the correction that is needed to align the eyes in order for the eyes to work together and see straight, “Rdg add” is known as reading addition-it’s the additional positive power needed for the eyes to focus on close work (usually only needed for people with presbyopia, who need 2 prescriptions; one for reading and one for distance).
The “VA” symbol stands for visual acuity – it indicates the standard vision for each eye when corrected. In the United States, visual acuity is measured at 20 feet. It’s measured in a fraction (numerator is 20). The larger the denominator, the worse the vision is. A visual acuity test is done with a standard eye chart. The chart has several rows with letters (top row-largest letters, bottom row- smallest letters). 20/20 vision means that when a person stands 20 feet away they can read what people should be able to see from that distance. In the USA, usually the 20/20 line is 4th from the bottom on the chart. Since 20/20 vision is good (considered normal vision), people with 20/20 vision would not need an optical prescription. Want to learn more about your prescription, contact our Houston eye doctor today!
Is your favorite paperback novel or e-reading device giving you more headaches than pleasurable reading lately? If you find yourself reaching for a bottle of pain killers after a chapter of reading, or an hour or so of reading the news or work articles on your tablet, you could be dealing with more than just stress or dehydration, but an optical condition that develops naturally over time. Headaches associated with reading are a symptom of the condition known as presbyopia, cause be strain on the eye as it finds increasing difficulty focusing on text up close. If you are experiencing increasing difficulty with seeing at a near range, even if you have never had problems with your sight before, you should contact your local Houston optometrist at the office of West U Vision for a comprehensive exam to diagnose your condition and help you achieve better vision.
Reading Glasses Houston
Though you may feel young yet, if you are over the age of 40 and having trouble reading or sewing or a bevy of other daily activities that require the need for vision at a close range, you are most likely coping with a developing case of presbyopia. This problem is not a disease which you can cure or a complication which a person could work to avoid, but is in fact a natural occurrence of aging. As our bodies grow beyond 40 years old, we often begin to experience the first signs of aging, including one which we cannot see in the mirror. As we grow older, the natural lens of our eyes loses its flexibility, causing it to stiffen and develop an increasing amount of difficulty focusing on objects or words directly in front of you. Presbyopia is one of the many reasons why your trusted Houston optometrist recommends and increasing number of optical examinations as you grow older, in order to closely monitor your eyes for any age-related problems which could develop.
Presbyopia may sound scary, but it is a very common condition that can be treated quite easily with specially made reading glasses crafted for you unique needs by a professional Houston optometrist. Reading glasses from our expert opticians at West U Vision is a far superior choice than a drug-store pair, as our staff can work to give you the exact prescription to fit your eyes. Our fully licensed and professionally trained team at the state of the art offices West U Vision understands the unique needs of our patients, as well as the busy lives they lead, and that’s why we are open six days a week for your convenience, making it easy for you to get the optical examination you need to properly diagnose your possible case of presbyopia.