Archive | June, 2012

What Are Floaters? Anything I Can Do To Prevent Them?

11 Jun

What Are Floaters by Dr. Nathan Schramm, O.D., C.N.S.The term “floaters” refers to small deposits or strands of Tissue that move within the jelly material inside the eye. As we age, this material begins to liquefy, causing floaters. Floaters are sometimes described as dust, black spots, spider webs, or insects in your vision. Most of the time they will move with your eyes. Floaters can happen at any age but are usually first noticed in our 20s. About 65% of the population has  large floaters by age 65. People more at risk are older, female, nearsighted, chromium deficient, or have a history of  head/eye trauma, eye surgery, or inflammation within the eye.

Chromium deficiency can increase your chances eightfold of having floaters. A very large percentage of Americans are chromium deficient, with some studies estimating as high as 80%. As we get older, we can suddenly develop a new, large floater called a PVD or Posterior Vitreous Detachment. This causes  you to feel like something moved in your peripheral vision and may cause flashes of light in your side vision. About 8 to  10% of the time a PVD can cause a retinal break. A retinal break can lead to a retinal detachment. Signs of a retinal  detachment can include a dark shade or curtain in your vision, a paprika haze, and/or onset of many new floaters. If you  have signs of a new PVD or detached retina you should see an eye doctor immediately for a dilated eye examination. There  are no eye drops that help floaters. Incisional surgery is only rarely perfomed to remove very large floaters.

Most floaters are benign and after initial presentation your brain will slowly begin to ignore them, especially as they settle  due to gravity. Avoid aspartame (often found in diet soda), it may weaken the retina. Nutrients that may strengthen the  retina include lutein, zeaxanthin, bilberry, and resveratrol, to name a few. Some foods that are good for your eyes include green leafy vegetables, blueberries, green tea, and red wine (in moderation).

Dr. Nathan Schramm, O.D., C.N.S. Is an Optometric Physician and a Certified Nutrition Specialist. He practices in Weston,  Florida. Dr. Schramm is currently accepting new patients and can be reached at 888-781-2020 or via email:  gr8eyedoc@gmail.com.

This article is not intended to replace a full eye examination by a qualified medical professional. A special thanks to Dr. Elias C. Mavrofrides, M.D., A vitreoretinal specialist, and Dr. Julie Abraham, O.D., for editorial support.

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Detailed Magnetic Resonance Imaging Findings Of Theocular Motor Nerves In Duane’s Retraction Syndrome

11 Jun

Dr. Nathan Schramm, OD, CNSAuthors: Dr. Nathan Schramm, O.D., N.C.S. and others*
Tianjin Medical University, Tianjing, China.

Abstract

PURPOSE:

To study the neuroanatomic characteristics of patients with Duane’s retraction syndrome with high-resolution magnetic resonance imaging.

METHODS:

The study included 11 consecutive cases, including five patients with type I, one patient with type II, four patients with type III, and one patient with inverse Duane’s retraction syndrome. The patients underwent magnetic resonance imaging of the brain, brain stem, cavernous sinus, and orbits.

RESULTS:

In 10 patients, the abducens nerve (cranial nerve VI) was absent or showed hypoplasia in the brain stem, cavernous sinus, and orbit. However, these findings were not seen in the patient who had inverse Duane’s retraction syndrome. In two children, magnetic resonance imaging showed that the cavernous sinuses were smaller on the affected side. The inferior division of the oculomotor nerve (cranial nerve III) was traced to enter the lateral rectus muscle or had intimate continuity with the lateral rectus muscle in nine patients with type I and type III Duane’s retraction syndrome. In one patient with type III Duane’s retraction syndrome, the oculomotor foramen was significantly larger on the affected side than on the sound side. In the patient with type II Duane’s retraction syndrome, the superior division of cranial nerve III was enlarged and had three branches. In the patient with inverse Duane’s retraction syndrome, the inferior division of cranial nerve III sent two branches to the medial rectus muscle, and the patient had superior oblique muscle hypoplasia.

CONCLUSION:

Neuroimaging findings showed that the absence of cranial nerve VI, hypoplasia in the brain stem, and an extra branch of the inferior division of cranial nerve III to the lateral rectus muscle is the most common presentation of Duane’s retraction syndrome, but not the only one. The aberrant branches likely correspond to the abnormal eye movement seen in patients with this disorder.

Copyright 2009, SLACK Incorporated.
PMID: 19791724 [PubMed – indexed for MEDLINE]
* Other Co-authors: Yonghong J, Kanxing Z, Zhenchang W, Xiao W, Xuehan Q, Fengyuan M, Wei L, Fanghua Z
J Pediatr Ophthalmol Strabismus. 2009 Sep-Oct;46(5):278-85; quiz 286-7. doi: 10.3928/01913913-20090903-05. Epub 2009 Sep 22.