image is sent to the brain. Figure 1.1 – Myopic Eye uncorrected With a Myopic eyeball‚ the point of clarity falls in front of the retina rather than on it. This makes close objects clear and far objects blurry. Figure 1.2 – Myopic Eye corrected by a concave lens When a Myopic Eye is correct by a concave lens‚ the light rays are refocussed on the retina. This now makes both close and far objects clear. Hyperopia is also a common vision impairment that unlike Myopia‚ far objects are seen
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Congenital diabetes‚ which is due to genetic defects of insulin secretion and it strikes new born babies. Today‚ I would share more regarding on damage to the eyes complications may faced by diabetic patients. Diabetic retinopathy damage to the retina which can eventually lead to blindness It affects up to 80 percent of all patients who have diabetes for 10 years or more. Diabetic retinopathy is the result of microvascular retinal changes. Thickens the basement membrane lead to incompetence of
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PHYSICS PROJECT TO STUDY THE OPTICAL LENS OF A HUMAN EYE Eyes are organs that detect light‚ and convert it to electro-chemical impulses in neurons. The simplest photoreceptors in conscious vision connect light to movement. In higher organisms the eye is a complex optical system which collects light from the surrounding environment; regulates its intensity through a diaphragm; focuses it through an adjustable assembly of lenses to form an image; converts this image into a set of electrical signals;
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Retinoblastoma is a rare cancer disease that affects the retina with a malignant tumor normally affecting young children from infants to small children around the age of five and rarely affecting adults. Retinoblastoma is autosomal dominant‚ meaning it’s present on the non-sex chromosomes and because it is dominant‚ and Mendel’s Law of Dominance claims that some genes are dominant and are over the recessive genes which prevents the recessive gene from being present. Retinoblastoma forms during pregnancy
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Science Form 2 note CHAPTER 1: THE WORLD THROUGH OUR SENSES 1.1 Sensory Organs and Their Functions Sensory Organs and Their Stimuli 1. Humans being have five main sensory organ‚ which are skin‚ nose‚ tongue‚ ears and eyes. 2. Sense detects stimuli‚ that is changes in surroundings (around us). 3. Five senses: i. sight ii. hearing iii. touch iv. taste v . smell 4. Senses are part of the body called sensory organs. 5. Changes or object
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~Subtractive color mixing is employed with paints and pigments‚ in contrast with additive color mixing with colored lights for spotlighting and theatrical lighting. ~Light is a form of electromagnetic energy that moves in wave like patterns. ~Retina is a light-sensitive layer of tissue‚ lining the inner surface of the eye. What are expected to be presented in the study? ~We are expected to present an investigatory project which explains how shadows are formed and how to make colored shadows
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the bottom of the brain immediately the hypothalamus. The SCN is a pair of distinct groups of cells located in the hypothalamus. The SCN receives information about illumination through the eyes. The retina of the eye contains photoreceptors‚ which are used for conventional vision. But the retina also contains
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amounts of abnormally high pressure in it. The third disorder is cataract‚ which is proteins in the lens of your eyes that have clumped together making the lens clear to cloudy. The fourth disorder would be retinal detachment which happens when the retina of the eye detaches for the back of your eye. A fifth disorder following convergence
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as sound. 6‚ Light rays enter the eye through the cornea. The cornea’s refractive power bends the light waves then they pass through the pupil. The light rays must then pass through the vitreous and come to a sharp converging point on the retina. The retina develops them into light impulses through millions of tiny nerve endings‚ then send them through over a million nerve fibers via the optic nerve to the brain. Diagram of a human’s eye:
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CHAPTER 4 – SENSATION AND PERCEPTION I. SENSORY AWARENESS * Sensation is the awareness or a mental process which is aroused due to the stimulation of the senses. * The activation of a sense organ using physical energy that processes the receiving of stimulus from the external environment. A. Stimulus – anything that arouses a sense organ to activity. B. Receptor organs – a highly specialized part of the body selectively sensitive to a definite stimulus. C. Sensory receptors
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