visual accommodation


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Related to visual accommodation: ocular accommodation

visual accommodation

a process by which the eye adjusts and is able to focus, producing a sharp image at various, changing distances from the object seen. The convexity of the anterior surface of the lens may be increased or decreased by contraction or relaxation of the ciliary muscle. With increasing age the lens becomes harder and less flexible, resulting in a loss of accommodation and usually of the ability to focus on nearby objects. Compare presbyopia.

accommodation

(a-kom?a-da'shon) [L. accommodare, to suit],

a; acc

1. Adjustment or adaptation.
2. In ophthalmology, a phenomenon noted in receptors in which continued stimulation fails to elicit a sensation or response.
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VISUAL ACCOMMODATION
3. The adjustment of the eye for various distances whereby it is able to focus the image of an object on the retina by changing the curvature of the lens. In accommodation for near vision, the ciliary muscle contracts, causing increased rounding of the lens, the pupil contracts, and the optic axes converge. These three actions constitute the accommodation reflex. The ability of the eye to accommodate decreases with age. Synonym: ocular accommodation; visual accommodation See: illustration
4. In the learning theory of Jean Piaget, the process through which a person's schema of understanding incorporates new experiences that do not fit existing ways of understanding the world. See: adaptation

absolute accommodation

Accommodation of one eye independently of the other.

binocular accommodation

Coordinated accommodation of both eyes jointly.

excessive accommodation

Greater-than-needed accommodation of the eye.

ill-sustained accommodation

Ill-sustained insufficiency.

mechanism accommodation

A method by which curvature of the eye lens is changed in order to focus close objects on the retina.

negative accommodation

Relaxation of the ciliary muscle to adjust for distant vision.

ocular accommodation

Accommodation (3).

positive accommodation

Contraction of the ciliary muscle to adjust for near vision.

reasonable accommodation

An employer's responsibility to provide necessary workplace changes in reassignment, equipment modification, devices, training materials, interpreters, and other adjustments for disabled employees.

relative accommodation

The extent to which accommodation is possible for any specific state of convergence of the eyes.

subnormal accommodation

Insufficient accommodation.

visual accommodation

Accommodation (3).

Patient discussion about visual accommodation

Q. My mind is getting confused now and i am losing on my focus. why is this change happening in me? I am a bipolar for the past 1 year. With the help of the medicines my episodes has come down. My mood is good and stable. Even my friends say that I am well as compared to previous years. But since last week I am not able to sleep well. My disrupted and reduced sleep is making me stressed. I just get 2-3 hours of sleep at night. After my lunch my tiredness starts again. My mind is getting confused now and I am losing on my focus. Why is this change happening in me?

A. There are some possibilities that you are not taking your diet in time or your diet may not be nutritious as per your requirements. This can cause you to have increased stress and you can lose your sleep. This may increase the tiredness. Check if you are taking your medicines in right time. This can also be due to your stress. You may have stress due to your lifestyle too, which needs to be well managed in a healthy way. You can meet your doctor, as any increase in stress due to sleep deprivation can raise the chances of episodes to return back.
http://www.youtube.com/watch?v=YdO5m_mfaTQ&eurl=http://www.imedix.com/health_community/vYdO5m%5EmfaTQ_bipolar_disorder_facts?q=bipolar%20disorder&feature=player_embedded

Q. Is there a verity of exercises i can do with my child that would be helpful for him to be more focused and relaxed and by that help him to control the ADHD effects ?

A. from our experience - any activity is a good activity...if he feels hyperactive during homework or studying, going out and running around the block will be enough for him. if he can't do that, doing push ups, situps, and even jumping in one place can help- although i must say it is irritating as hell... try practicing also breathing techniques in order to relax.

More discussions about visual accommodation
References in periodicals archive ?
Additional findings included the beneficial impact of active visual accommodations on the level of accuracy of the participants' choices.
Future research should also focus specifically on the impact of active visual accommodations and other components of the intervention separately.
Intervention Participant Preferred Neutral Aaron Clear ball Block Star stacker Bubbles Rain stick Kleenex Telephone Picture Rolling dog Boat with balls Carson Rolling dog Kleenex Bubbles Block Butterfly Elastic bandage Buggy rattle Yellow Post-It Spinner Ladybug Cathy Octopus Weight Switch with lights Kleenex Switch with glitter Picture Red ball String Glitter dumbbell Toothbrush Maintenance and generalization Participant Preferred Neutral Aaron Clifford String Pink ball White rabbit Hairy ball Feathers Carson Jukebox String Dumbbell Picture Bead curtain Reflective paper Cathy Tape player Spoon Yellow ball Rubber band Track ball Hairy ball Table 2 Participants' Visual Accommodations.