MIRROR -The simplest and the most common optical instrument. -Uses the Law of Reflection to redirect light it receives. -It reflects most of the light in one direction. -Good reflecting mirrors can have 85% reflectance. Types of Mirror 1. Plane Mirror A mirror with a flat surface. Image formed: Laterally inverted Upright and always the same size as the object they reflect. Virtual image (images appear to behind the mirror) at the same distance as the object in front of the mirror. Examples:
Premium Eye Optics Mirror
light enters the eye by adjusting the size of the pupil (the opening at the center of the iris). Although eyelids‚ eyelashes‚ tears‚ and conjunctiva protect the eye’s surface‚ they cannot protect the eye from internal problems such as hyperopia (farsightedness)‚ myopia (nearsightedness)‚ astigmatism‚ and presbyopia. The ear enables people to hear or detect sounds. There are different parts of the ear: the outer ear‚ middle ear‚ and inner ear. The outer ear holds the pinna that gathers sound waves
Premium Eye Auditory system Retina
blurred or distorted? There are many reasons for long-term obscure or distorted vision. In general‚ watching distant objects or near objects when feeling blurred vision‚ may be the eyes of the refractive problems. You may be suffering from myopia‚ hyperopia‚ astigmatism or old flowers. The correction method is usually wearing glasses‚ contact lenses or laser correction surgery. More severe visual blurring or distortions are generally caused by age-related macular degeneration‚ which usually affects
Premium
NAME LAB TIME/DATE _ Special Senses: Vision Anatomy of the Eye 1. Name five accessory eye structures that contribute to the formation of tears and/or aid in lubrication of the eyeball‚ and then name the major secretory product of each. Indicate which has antibacterial properties by circling the correct secretory product. Accessory structures lacrimal glands conjunctiva tarsal or meibomian glands caruncle ciliary glands Product saline solution; Clysozym0 mucus oily secretion whitish
Premium Eye Skin Adipose tissue
Gerontologic considerations DEFINITIONS Ophthalmologist Optician Optometrist REFRACTIVE ERRORS This defect is a result of irregular corneal curvature‚ length of the eye‚ or the focusing power of the lens *Myopia * Hyperopia * Presbyopis * Astigmatism * Aphakia GERONTOLOGIC CONSIDERATIONS Normal Changes Psychosocial Impact * Common Dysfunctions • Cataracts • Macular Degeneration • Glaucoma VISION HEALTH PROMOTION HEALTH
Premium Ophthalmology
Human Eye The eye is a wonderful and the most complex organ of the human body. It is strange to learn that such a small organ has so many parts. The human eye provides us with the ability to visualize the world around us. Light enters the eye through the cornea and excites special neurons on the retina. The brain receives this information and interprets it so that we are aware of what we are seeing. The parts of the eye contribute to its proper function. A. Parts of the Human Eye A1
Free Eye
temporary/permanent hearing loss? Head injuries‚ allergies‚ measles‚ mumps‚ exposure to excessive or prolonged noise‚ down syndrome‚ frequent colds‚ and ear infections. c) What vision disorders can be fond in young children? Amblyopia‚ strabismus‚ myopia‚ hyperopia 5) List and describe 5 chronic diseases
Premium Domestic violence Red blood cell Ear
Stephanie Psychology Quiz 2 September 27‚ 2012 1. The field of Neuropsychology studies how the brain and nervous system affection our function day to day. Neuropsychologist use methods to evaluate‚ treat‚ and rehabilitate individuals with suspected or demonstrated neurological or psychological problems. 2. The left side of the brain controls the muscles on the right side of the body and the right side of the brain controls the muscles on the left side of the body. Sensory information
Premium Nervous system Brain Neuron
Did you get it? 1. What’s the role of eyelids? To protect the eyes. 2. Which structure of eye forms tears? Lacrimal glands 3. What are tears? A dilute saline solution containing lysozyme and antibodies. 4. What’s the visual role of the external eye muscles? They direct the eyeball toward what you wish to see. 5. What is the meaning of the term blind spot in relation to the eye? The blind spot contains no photoreceptors; it is the site where the optic nerve leaves the eyeball 6. What function
Free Eye
LASIK SURGERY Laser-Assisted in Situ Keratomileusis LASIK or Lasik (Laser-Assisted in Situ Keratomileusis)‚ commonly referred to as laser eye surgery‚ is a type of refractive surgery for the correction of myopia‚ hyperopia‚ and astigmatism. The LASIK surgery is performed by an ophthalmologist who uses a laser or microkeratome to reshape the eye’s cornea in order to improve visual acuity. For most patients‚ LASIK provides a permanent alternative to eyeglasses or contact lenses. Major side effects
Premium Ophthalmology Contact lens