INTRODUCTION Defects of Hearing •Hearing defects means ear is not working correctly or as well as it should. •It may occur in more than one part of the ear. •1. DEAF-full or partial decrease in the ability to detect or understand sounds. Deaf usually caused by : - Eardrum is torn-cannot function - Ossicle bone fused together-can’t vibrate - Auditory nerve damaged by loud sound - Cochlea damage due to sickness/ drugs •2. Temporary hearing loss-build-up of earwax •3. Presbycusis- hearing loss
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measuring the human visual system in relation to diagnosticprocedures and optical correction.In a series of three articles‚ John will give us the backgrounds we need to understand the basis of wave front technology. A technology many in the contact lens industry believe will cause a dramatic change in the coming years. The editors of Global CONTACT are happy to offer a series of basic articles on this subject which will be very informative. happens if we apply such lenses to the human visual system
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Name _______________________________ /15 marks Three questions will be selected at random and graded. Each question will be valued at 5 marks in which it will be graded based on: a) Content contained in the answer b) Answering in a logical manner in complete sentences using proper grammar and spelling. c) If the answer requires a mathematical calculation‚ the use of proper mathematical format‚ showing numerical
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Northern Caribbean University Department of Biology‚ Chemistry and Environmental Sciences **** BIOL 165: ANATOMY & PHYSIOLOGY1 Laboratory Manual 2013-2014 http://www.udel.edu/biology/Wags/histopage/colorpage/cin/cin.htm To be used in Anatomy & Physiology-BIOL 165 & 166 labs only Not to be used as a source of reference Not to be sold or distributed outside of the classroom Lecturers: Nadia Washington‚ MSc. Delano Lewis‚ PhD. Disclaimer
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that was useful in helping me determine the order was 400x. This magnification allowed me to see that the yellow color thread was on the bottom and that the green color thread was in the middle. The optical principles that are in play here are perfect lens characteristic and transmitted light microscopy optical pathways. Interpupillary distance is the distance between the centers of the pupils of the two eyes. The way to determine what the interpupillary distance is with a device
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Executive Summary This paper is to find out the marketing plan of England Optical Group (EOG). This paper will focus on EOG‚ optical market and EOG’s main competitor (Focus-Point). This paper will consist of EOG history‚ background‚ weakness and strength and all types of marketing issues. This paper also will consist of optical business environment which included the environment‚ opportunity and threat in this industry. Besides‚ this paper will included some part of Focus Point information about
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learned in our lab‚ we need a good source of light for something to become clear. The mirrors that are used for the telescope cause the light to be reflected off of one mirror onto the other which then create a clear image from the large convex lens. “Because these light rays are parallel to each other‚ the reflector telescope’s mirror has a parabolic shape to focus the light rays back to a single point on the secondary telescope mirror. The secondary telescope mirror is flat and reflects the
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Technology Devices to Overcome the Limitations of Sight and Hearing Humans have sight and hearing limitation. Without any devices‚ our sight and hearing was limited. Most of the limitation of sight can be overcome with the help of certain optical instruments such as magnifying glass‚ microscope‚ binoculars and others. The range of frequency of hearing in human 20 Hz to 20 000 Hz. It was different according to the age of a person. Hearing limitations can be overcome by using devices such as
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properly. 5. Examine the microscope and give the function of each of the parts. NO. NAME FUNCTION 1 eyepiece 2 - arm -Contains a magnifying lens 3 - stage -Contains a magnifying lens 4 - opening of the - Supports the body tube
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Experiment 6- The Pathways of Plant Water Movement Aim: To investigate the movement of materials in xylem Materials: Fresh celery stalk with leaves Eosin solution (1%) A plastic container with tap water A sharp scalpel Hand lens A light microscope Two glass slides A cover slip Risk Assessment and Safety Precautions: Risk Assessment Safety Precautions Eosin solution- can cause stains Always use gloves when handling Scalpel is dangerous and can cause cuts Always handle
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