Ophthalmology - Animated Medical Dictionary

6 hrs    

Video - 350    

The FOCUS Animated Concise Dictionary of OPHTHALMOLOGY is the first ever animated dictionary in the subject. A valuable reference for physicians and students alike, it covers over 350 ophthalmology related terms and definitions. All the definitions have been graphically described with the help of 3D animations and are accompanied by text definitions.

Chapter

Ophthalmology - Animated Medical Dictionary
  • Aberration

    Aberration is the inability of light entering the eye to converge on the retina. This condition is perceived as distortion and is usually associated with astigmatism.

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  • Accommodation disorder

    Accommodation disorder is the inability of the eye to change focus from one distance to another. This results from decreased elasticity of the lens in the eye. There are three major accommodation disorders. They are Myopia or short-sightedness wherein the image gets focused in front of the retina and hypertropia or long-sightedness that results from image getting focused behind the retina. The third condition astigmatism is the absence of sharp focus.

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  • Accomodation

    Accommodation refers to the flexibility of eye lens to change its shape while viewing objects at different distances.

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  • Achromatopsia

    Achromatopsia, also known as colour blindness, is a hereditary vision disorder that manifests as a deficiency in perception of colour due to monochromatic vision. This is due to insufficient photoreceptors called cones, which are normally present in the retina. In the absence of cones, another type of photoreceptor called rods take-up the function of providing vision. But, rods, which are basically for dark-adapted vision, do not provide colour vision or good detailed vision, and are very sensitive to bright light. Hence individuals with achromatopsia are totally or almost totally colour blind and have hazy vision or their vision is completely washed out in daylight.

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  • Acuity

    Acuity is the clearness and sharpness of vision. Acuity depends on the sharpness of the retinal focus within the eye as well as central nervous system sensitivity.

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  • Age-related macular degeneration

    Age-related macular degeneration (AMD) is a degenerative condition that occurs due to advancing age. It affects the macula lutea or the central part of the retina where the rods and cones are most dense, causing some degree of vision loss. It impairs the sharp central vision needed for tasks such as reading and color vision.

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  • Amaurosis

    Amaurosis is partial or total blindness of eye, a condition that does not involve any lesions. It results from disease of the optic nerve, spine or brain. It may also result from systemic causes such as diabetes, neurological diseases, kidney disease, or excessive alcohol intake or tobacco use rather than conditions that directly affect the eye.

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  • Amblyopia

    Amblyopia is also known as lazy eye. It is the impairment of vision in one eye and is caused by developmental abnormalities in the vision.

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  • Amsler grid testing

    Amsler grid testing is a sensitive screening test to identify central visual field defect, particularly age related macular degeneration. Amsler grid consists of horizontal and vertical black lines on a white background, forming a square grid with a small central spot. The test is performed by wearing normal spectacles at normal readable distance by covering one eye, while the other eye is allowed to focus on the central spot of the grid. Patients with macular disease may see wavy lines or some lines may appear missing.

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  • Aniridia

    Aniridia is a rare congenital hereditary condition characterised by underdeveloped iris and sometimes the absence of the iris. The condition usually occurs in both eyes due to poor development of the retina. A circular stump of tissue is observed using a gonioscope.

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