Amplify EyeCare Manhattan Logo
Authors
SURYAKUMAR, R, BSOptom, MSc; BOBIER, W R., OD, PhD, FAAO, MBCO

Gain and Movement Time of Convergence-Accommodation in Preschool Children

publication date
July 2004
Category
see more

Abstract/Introduction

Background

Convergence-accommodation is the synkinetic change in accommodation driven by vergence. A few studies have investigated the static and dynamic properties of this cross-link in adults but little is known about convergence-accommodation in children. The purpose of this study was to develop a technique for measuring convergence-accommodation and to study its dynamics (gain and movement time) in a sample of pre-school children.

 

Method

Convergence-accommodation measures were examined on thiry-seven normal pre-school children (mean age = 4.0 ± 1.31 yrs). Stimulus CA/C (sCA/C) ratios and movement time measures of convergence-accommodation were assessed using a photorefractor while subjects viewed a DOG target. Repeated measures were obtained on eight normal adults (mean age = 23 ± 0.2 yrs).


Conclusion/Results

Results

The mean sCA/C ratios and movement times were not significantly different between adults and children (0.10 D/Δ [0.61 D/M.A.], 743 ± 70 ms and 0.11 D/Δ [0.50 D/M.A.], 787 ± 216 ms). Repeated measures on adults showed a non-significant mean difference of 0.001 D/Δ.

 

Conclusion

The results suggest that the possible differences in crystalline lens (plant) characteristics between children and adults do not appear to influence convergence-accommodation gain or duration.


Testimonials


At Amplify with Dr Wernick I was seeking help for seemingly intractable, probably age-related dryness. I've seen other doctors about it, and that has been helpful, but what he explained to me about it and the careful way he answered all my questions gave me so much more of a clear understanding of what is going on (and is not) that I am more able to implement all his and others' recommendations than I was before. And he gave me additional resources for further follow-up. I am most grateful.


Cynthia Norton

Wow! This is a great Eye Care medical facility. I was thoroughly examined by Dr. Pinkhasov for over 2 hours. She made sure to check my eyes for pretty much everything and patiently explained proper care for my eyes. They definitely know how to provide great care and treat their patients right. Now I know why they have such a great reputation and been around for so long.


Steve Fay

Dr. Kavner is a gifted diagnostician and orthoptic therapist. He treated me several decades ago for a condition similar to dyslexia. I was having migraines five times per week. I worked with him for about a year and I experienced tremendous improvement (down to 3-4 per year) that has lasted.


Mary K.

Dr. Kavner recommended two types of eye therapy for my daughter. One of them using bio-feedback. In just three sessions she is seeing considerably better. She shouted this morning: Ooh my God! I could not see these letters with my glasses on, and now I can see them without my glasses. If you are willing and able to invest in improving your vision, this is a good place to go to!


Peter G.

Dr. Kavner recommended two types of eye therapy for my daughter. One of them using bio-feedback. In just three sessions she is seeing considerably better. She shouted this morning: Ooh my God! I could not see these letters with my glasses on, and now I can see them without my glasses. If you are willing and able to invest in improving your vision, this is a good place to go to!


Kinkie F.

I have always found Dr Kavner's work, expertise and wisdom of the highest caliber. As one of the fathers of OT, occupational othomology, his depth and breadth of knowledge about the eyes' health and wellbeing of the patient is exemplary. Cannot say enough good things about him.


Allen B.
1 2 3

Blog

what-we-can-see-is-that-you-are-healthy

The effects of digital screen usage on children's vision health

Pediatric eye health is a critical aspect of a child’s life and development. Good vision is not just about clarity […]

Read More
pexels-nataliya-vaitkevich-5843348

Headaches and Eye Problems: What You Need to Know From Our NYC Functional Optometrist

Do you experience headaches when reading, using the computer, or doing close work? If so, it might be an eye […]

Read More
strabismus_esotropia_large-e1627986452983

Dry Eyes After LASIK: Symptoms, Causes, and Treatment Options

LASIK is an eye surgery that has helped many people correct their refractive error and improve their vision. The LASIK […]

Read More
see all blogs

Contact Us To Amplify Your EyeCare

Working Hours

Monday - Thursday
8:00 am - 5:15pm
friday-sunday
Closed
Location
235 East 67th Street, Suite 201, New York, New York, 10065
Website Accessibility Policy
Safety protocols page
phone-handsetarrow-uparrow-right linkedin facebook pinterest youtube rss twitter instagram facebook-blank rss-blank linkedin-blank pinterest youtube twitter instagram