Featured Research

from universities, journals, and other organizations

Major Study Of Preschoolers' Visual Acuity Finds Fault With A Standard Eye Test

Date:
October 6, 2008
Source:
American Academy of Ophthalmology
Summary:
Visual acuity --- the ability to see objects in sharp detail --- was evaluated in 1,504 children aged 30 to 71 months as part of the Baltimore Pediatric Eye Disease Study, the first large, population-based study of eye disorders in preschool children. Researchers found that FPT --- considered the "clinical standard" for testing vision in preverbal children and the only test widely available to eye specialists for this age group --- did not accurately identify the presence or absence of visual acuity problems in this study population.

Visual acuity---the ability to see objects in sharp detail---was evaluated in 1,504 children aged 30 to 71 months as part of the Baltimore Pediatric Eye Disease Study, the first large, population-based study of eye disorders in preschool children.

Related Articles


Ophthalmologists agree on the importance of finding and treating vision problems early in a child's life to avoid potentially life-long negative impacts. Prior to the Baltimore study, little data was available on vision disorders in very young children in the United States.

The children were evaluated in a series of vision tests, including the fixation preference test (FPT) and the Amblyopia Treatment Study test (ATS). The FPT measures an aspect of visual acuity known as fixation, the ability to focus images on the macula, the part of the eye that provides detailed vision. In the FPT, each eye is covered and then uncovered to determine how well it maintains fixation.

The specific purpose of the ATS test is to measure visual acuity in children 30 months and older. "Decreased" visual acuity in study participants was assessed by comparing the children's results to normal vision standards for their age groups. Tests were repeated for all subjects 60 days later with children wearing corrective eyewear, if needed. Subjects were classified as either non-Hispanic white or black (African-American), and results for the groups were compared. Parents of all subjects completed questionnaires regarding the mother's health during pregnancy, the child's general health and development, and any concerns about the child's ability to perform daily activities.

Overall, the prevalence of decreased visual acuity was low: 1.2 percent in white children and 1.8 percent in black. Prevalence at retesting, with corrective eyewear as needed, was 0.5 percent in whites and 1.1 percent in blacks. Differences between the two ethnic groups were not statistically significant. The most common cause of decreased acuity at initial testing was refractive error: nearsightedness, farsightedness and/or astigmatism. Only one child was found to be legally blind.

Importantly, the researchers found that FPT---considered the "clinical standard" for testing vision in preverbal children and the only test widely available to eye specialists for this age group---did not accurately identify the presence or absence of visual acuity problems in this study population. The inaccuracies became apparent when ATS and FPT results were compared for children able to perform both tests.

"These results call into question the use of FPT for clinical decision making," said lead researcher David S. Friedman, MD, PhD, Wilmer Eye Institute, Johns Hopkins School of Medicine. "Given its poor performance, the accuracy of clinical interventions based on FPT is questionable, as are studies that use FPT as an outcome measure. If the experience of this study can be generalized, the use of FPT should be reconsidered."

This research was published in the October 2008 issue of Ophthalmology, the journal of the American Academy of Ophthalmology.


Story Source:

The above story is based on materials provided by American Academy of Ophthalmology. Note: Materials may be edited for content and length.


Cite This Page:

American Academy of Ophthalmology. "Major Study Of Preschoolers' Visual Acuity Finds Fault With A Standard Eye Test." ScienceDaily. ScienceDaily, 6 October 2008. <www.sciencedaily.com/releases/2008/10/081001183008.htm>.
American Academy of Ophthalmology. (2008, October 6). Major Study Of Preschoolers' Visual Acuity Finds Fault With A Standard Eye Test. ScienceDaily. Retrieved November 26, 2014 from www.sciencedaily.com/releases/2008/10/081001183008.htm
American Academy of Ophthalmology. "Major Study Of Preschoolers' Visual Acuity Finds Fault With A Standard Eye Test." ScienceDaily. www.sciencedaily.com/releases/2008/10/081001183008.htm (accessed November 26, 2014).

Share This


More From ScienceDaily



More Health & Medicine News

Wednesday, November 26, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

From Popcorn To Vending Snacks: FDA Ups Calorie Count Rules

From Popcorn To Vending Snacks: FDA Ups Calorie Count Rules

Newsy (Nov. 25, 2014) — The US FDA is announcing new calorie rules on Tuesday that will require everywhere from theaters to vending machines to include calorie counts. Video provided by Newsy
Powered by NewsLook.com
Daily Serving Of Yogurt Could Reduce Risk Of Type 2 Diabetes

Daily Serving Of Yogurt Could Reduce Risk Of Type 2 Diabetes

Newsy (Nov. 25, 2014) — Need another reason to eat yogurt every day? Researchers now say it could reduce a person's risk of developing type 2 diabetes. Video provided by Newsy
Powered by NewsLook.com
Madagascar Working to Contain Plague Outbreak

Madagascar Working to Contain Plague Outbreak

AFP (Nov. 24, 2014) — Madagascar said Monday it is trying to contain an outbreak of plague -- similar to the Black Death that swept Medieval Europe -- that has killed 40 people and is spreading to the capital Antananarivo. Duration: 00:42 Video provided by AFP
Powered by NewsLook.com
Are Female Bosses More Likely To Be Depressed?

Are Female Bosses More Likely To Be Depressed?

Newsy (Nov. 24, 2014) — A new study links greater authority with increased depressive symptoms among women in the workplace. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
 
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:  

Breaking News:

Strange & Offbeat Stories

 

Health & Medicine

Mind & Brain

Living & Well

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:  

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile iPhone Android Web
Follow Facebook Twitter Google+
Subscribe RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins