Dominant Eye Test

The dominant eye is the eye that looks directly at an object. The non-dominant eye is the eye that looks at the same object at a slight angle. This small difference provides depth perception.

Being right or left handed will not necessarily determine if you are right or left eye dominant.

Eye dominance is an important consideration for monovision correction to reduce the need for reading glasses or bifocals. Anyone who is presbyopic should consider monovision.

Determining the dominant eye is actually very simple. We have developed a free USAEyes Dominant Eye Test Card that you can download and print from your computer.

After printing the card, cut away the dotted lines. Hold the card at arm's length and focus on a stationary object through the center hole. While staying focused on the object, bring the card close to your face. The card will automatically center on the eye that is dominant. Feel free to distribute the USAEyes Dominant Eye Test Card to your friends.

Another similar test for eye dominance is with the both eyes open, raise your right arm and point to an object in the distance. Anything more than about 20 feet away is ideal. Continue to look at and point at the object and cover the left eye. Did your pointing finger seem to move off the target? Continue pointing and cover your right eye. Did your pointing finger seem to move off the target with your right eye covered? Your dominant eye is the eye you using when the pointing finger does not seem to move. Being right or left handed will not necessarily determine if you are right or left eye dominant.

Try both tests. They should both determine the same eye is dominant.

If you are ready to choose a doctor to be evaluated for conventional or custom wavefront Lasik, All-Laser Lasik, PRK, LASEK, Epi-Lasik, NearVision CK, RLE, or any refractive surgery procedure, we highly recommend you consider a doctor who has been evaluated and certified by the USAEyes nonprofit organization. Locate a USAEyes Evaluated & Certified Lasik Laser Eye Surgeon.

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Current Dominant Eye Medical Journal News...

A 350 bp region of the proximal promoter of Rds drives cell-type specific gene expression.

Related Articles

A 350 bp region of the proximal promoter of Rds drives cell-type specific gene expression.

Exp Eye Res. 2010 Aug;91(2):186-94

Authors: Cai X, Conley SM, Cheng T, Al-Ubaidi MR, Naash MI

RDS (retinal degeneration slow) is a photoreceptor-specific tetraspanin protein required for the biogenesis and maintenance of rod and cone outer segments. Mutations in the Rds gene are associated with multiple forms of rod- and cone-dominant retinal degeneration. To gain more insight into the mechanisms underlying the regulation of this gene, the identification of regulatory sequences within the promoter of Rds was undertaken. A 3.5 kb fragment of the 5' flanking region of the mouse Rds gene was isolated and binding sites for Crx, Otx2, Nr2e3, RXR family members, Mef2C, Esrrb, NF1, AP1, and SP1 in addition to several E-boxes, GC-boxes and GAGA-boxes were identified. Crx binding sequences were conserved in all mammalian species examined. Truncation expression analysis of the Rds promoter region in Y-79 retinoblastoma cells showed maximal activity in the 350 bp proximal promoter region. We also show that inclusion of more distal fragments reduced promoter activity to the basal level, and that the promoter activities are cell-type and direction specific. Co-transfection with Nrl increased promoter activity, suggesting that this gene positively regulates Rds expression. Based on these findings, a relatively small fragment of the Rds promoter may be useful in future gene transfer studies to drive gene expression in photoreceptors.

PMID: 20447394 [PubMed - indexed for MEDLINE]