We have all heard the terms ‘vision screening’ and ‘eye exam’. The general public often uses them interchangeably, but did you know that they are are not the same? In fact, there are some big differences between the two. This article aims to explain the key differences between a vision screening and an eye exam.
What is vision screening?
According to the American Association for Pediatric Ophthalmology and Strabismus (AAPOS), a vision screening is defined as:
“an efficient and cost-effective method to identify children with visual impairment or eye conditions that are likely to lead to vision loss, so that a referral can be made to an appropriate eye care professional for further evaluation and treatment.”
In other words, it is a relatively short exam with the purpose of catching potential problems with vision which can then be further investigated by a qualified specialist, such as a ‘kids ophthalmologist’ or a ‘pediatric eye doctor’, officially known as a ‘pediatric ophthalmologist’.
What is an eye exam?
An eye exam is a much more comprehensive examination, which takes longer and may involve a number of different tests. It is performed by a pediatric ophthalmologist (or in layman’s terms a ‘kid’s ophthalmologist’ or ‘pediatric eye doctor’). The tests (or in insurance lingo, procedures) conducted include :
Physical examination of the eye
The basic cornerstone of a visit is the complete examination of the outside and the inside of the eye. This checks for the health of all of the parts of the eye. The doctors use tools with lights and lenses to examine the inside of the eye to check the health of the retina, the lens, and optic nerve. On the outside, they examine the eyelids, conjunctiva, cornea and iris. Many people recognize the piece of equipment called a slit lamp. It has a chin rest for the patient to rest on while the doctor looks through lens into the eye.
This visual acuity test is the test we normally think of when we remember our own eye exams and how we were checked to see if we might need glasses. The ‘Snellen chart’ is used, which is a list of letters which get progressively smaller. Older patients may be asked to read the letters, starting with the larger letters and moving to the smaller letters. Pediatric eye doctors use other methods to perform a refraction for patients who are not verbal or do not know their letters. Eye drops may be given to relax the focus of the eye. These drops also cause the pupil to dilate (open wider). With the focusing mechanism of the eye relaxed, it is possible for the doctor to measure if there is a need for glasses, even in non-verbal children.
Color blindness test
Difficulty distinguishing between certain shades of red and green – red/green color blindness – is common and found in about 8% of males. When your child is old enough to participate with the etest, they will have a color vision check as part of their eye exam.
Ocular motility test
The ocular motility test is designed to test for disorders of eye alignment and/or movement. It is used to determine if there is a condition called strabismus, and also to detect conditions such as convergence insufficiency or weakness.
This is a test of depth perception and useful in determining if the child is able to use both eyes together (i.e., has normal fusion).
What is the difference between vision screening and an eye exam?
Reasons to have an eye exam
According to AAPOS and the American Academy of Ophthalmology, parents should schedule an eye exam for their child if:
- Their child fails a vision screening;
- The vision screening is inconclusive or cannot be performed;
- A pediatrician or school nurse indicates an eye exam is required;
- Their child complains of problems with their vision;
- Their child has a learning disability, developmental delay, neuropsychological condition, or behavioral issue.
- The child reaches 3-4 years of age and has not yet had an eye exam.
About our Doctors
Dr. Lambert, a board-certified pediatric ophthalmologist and strabismus surgeon, is the founder of Pediatric Eye Associates, LLC. Originally from New Jersey, Dr. Lambert attended public schools in Millburn before attending Bryn Mawr College in Pennsylvania, where she graduated magna cum laude. After receiving her MD from Case Western Reserve University in Cleveland, Ohio, Dr. Lambert completed an internship at Yale University’s Department of Internal Medicine and a three-year residency in ophthalmology at New York University where, in her final year, she was selected to be chief resident of the program. Following her residency, Dr. Lambert worked as a fellow in pediatric ophthalmology and strabismus at Indiana University, one of the nation’s top training programs for this subspecialty.
Rachel Bloom, MD is a board-certified, fellowship-trained pediatric ophthalmologist.
Originally from Long Island, New York, and a summa cum laude graduate of Brandeis University, Dr. Bloom received the prestigious Alumni Scholarship to attend medical school at Albert Einstein College of Medicine in New York. She completed her residency in ophthalmology and fellowship in pediatric ophthalmology and strabismus at the Albert Einstein College of Medicine, Montefiore Medical Center.
About Pediatric Eye Associates
Every child is different but all require the best quality of care, and we are here to provide just that. Don’t hesitate to come see us – the sooner a vision abnormality is detected, the sooner we can start treating it. We are always happy to answer any questions you may have. Contact us if you’d like to schedule an appointment at our office or of you have any questions regarding Pediatric Eye Associates. We are looking forward to seeing you soon!