Anomalies of Accommodation
As we know that in an emmetropic eye, parallel rays of light coming from infinity are brought to focus on the retina, with Accommodation at rest. Our eyes have been…
Effective Mechanism And Binocular Accommodation
The essential factor in accommodation is a contraction of ciliary muscle, convergence and the contraction of pupil. This associated action is called synkinesis. The convergence and accommodation are closely related…
Range And Amplitude Of Accommodation
In emmetropic eye parallel rays of light coming from infinity refract & focus on the retina, when accommodation at rest. Accommodation: It is the unique ability of eye to focus…
Theories of Accommodation
The mechanism whereby the converging power of the eye is increased so that a distinct image is still retained is called ACCOMMODATION. (Ref: Duke-Elder & David Abrams) ACCOMMODATION refers to…
Treatment Of Aniseikonia
Aniseikonia is a condition where the ocular image of an object seen unequal in size and shape. That means actually, "not equal image" from two eyes. In most of patient…
Here we see right eye have no power & left eye have high minus power, so image projected to the visual cortex in LE is same as the object, but RE image is small than the object.
Clinical Measurements Of Aniseikonia
In older optometric/ophthalmic textbooks, rules of thumb have been defined to correct aniseikonia, without actually testing for the amount of aniseikonia. These rules are based on Knapp’s law, which deals…
Signs & Symptoms of Aniseikonia
The term aniseikonia is used to define the ophthalmic disorder of human where an object producing a different size of image in the two eyes retina. Most of the time…
Here we see right eye have no power & left eye have high minus power, so image projected to the visual cortex in LE is same as the object, but RE image is small than the object.
Clinical Types Of Aniseikonia
Aniseikonia is an ocular condition, where the image projected to the visual cortex from two retinaie are abnormally unequal in size and shape, mainly aniseikonia is a defect of binocular…
ETIOLOGY OF ANISEIKONIA
INTRODUCTION OF ANISEIKONIA: Aniseikonia usually means unequal image. The word " Aniseikonia " comes from the Greek morphology. "A" means Not + "iso" means equal + "konia" means image. Aniseikonia…
MANAGEMENT OF ASTHENOPIA
Asthenopia, commonly known as eyestrain (as-the-no-pia: fatigue of eyes) is caused mainly due to prolonged near work, leading to fatigue of eyes. Management of asthenopia: Adjust the lighting: Keep your…