RNIB NI's Looking Ahead, A Parent's Guide (PDF, 560kb)

More documents

Recommendations

Info

Master <strong>RNIB</strong> Booklet_Layout 1 10/09/2012 15:10 Page 34 34 Jargon Busting This information may help you to put complex visual jargon and measurements into more manageable terms. Accommodation is the process by which the optical power to maintain a clear image on an object as it draws near the eye. The eyes ability to accommodate gradually reduces over time. Amblyopia is the term used for a ‘lazy eye’. It is an eye that has more reduced or poorer vision than the other. Usually an amblyopic eye is a healthy eye that cannot be corrected with glasses (to achieve a ‘normal level’ of vision) due to poor development. Quite often a child with amblyopia or a lazy eye has or can develop a ‘strabismus’ or squint. Astigmatism usually means that the front surface of the eye is shaped like a rugby ball. It is very common in both persons with normal vision and those with impaired vision.
Master <strong>RNIB</strong> Booklet_Layout 1 10/09/2012 15:10 Page 35 35 Contrast Sensitivity is the direct comparison of one object’s colour or intensity to another i.e. a letter chart with black letters on a white background. Parents can sometimes wear bright distinctive clothing, making it easier for their child to pick them out from a crowd. Electrophysiology measures the amount of electrical activity along the visual pathway. Skin sensors / electrodes are placed on the scalp or eyelid, and a flashing light or checkerboard pattern is shown to the individual. Brain or electrical activity is then recorded via the little sensors. This procedure is painless. Hypermetropia is a common sight problem that affects someone’s ability to see close-up objects. Commonly known as long-sightedness, Myopia is short-sightedness, also known as near-sight. Nystagmus (dancing or wobbly eyes) is an involuntary flickering movement of the eyes, which makes fixation difficult and can reduce reading speed.
Page 1 and 2: Master RNIB Booklet_Layout 1 10/09/
Page 35: Master RNIB Booklet_Layout 1 10/09/

RNIB NI's Looking Ahead, A Parent's Guide (PDF, 560kb)

Create successful ePaper yourself

Delete template?

Save as template?