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Low Vision Aids Practice
Ajay Kumar Bhootra
1:
Introduction
VISUAL DISTURBANCES PRODUCED BY LOW VISION
PSYCHOLOGY OF LOW VISION PATIENTS
PRINCIPLES OF LOW VISION PRACTICE
2:
Low Vision Examination
HISTORY TAKING
READING AND NEAR VISION
ACTIVITIES OF DAILY LIVING
LIGHT AND GLARE
VOCATIONAL AND EDUCATIONAL
EMOTIONAL AND RECREATIONAL
AMSLER GRID TEST
CONDITIONS FOR EXAMINATION
VARIOUS TYPES OF CHARTS
PROCEDURE
UTILITY
PERIPHERAL FIELD OF VISION TEST
GLARE TEST
BINOCULAR VISION TEST
COLOUR VISION TEST
DIAGNOSTIC PURPOSE
FUNCTIONAL
PUPILLARY RESPONSE TEST
CONTRAST SENSITIVITY TEST
NEED FOR CST IN LOW VISION
METHOD
CHARTS
REFRACTION
SUBJECTIVE REFRACTION
DISTANCE VISUAL ACUITY TEST
SNELLEN'S CHART
FEINBLOOM CHART
BAILEY AND LOVIE CHARTS
NEAR VISION ACUITY TEST
MN READ CHART
LIGHTHOUSE NEAR TEST CARD
PROBLEMS WITH PROJECTION CHART
3:
Common Disorders Encountered in Low Vision
ACHROMATOPSIA
CONDITION
AREA AFFECTED
VISUAL AFFECTS
LOW VISION AIDS
AGE RELATED MACULAR DEGENERATION
CONDITIONS
AREA AFFECTED
VISUAL AFFECTS
LOW VISION AIDS
DIABETIC RETINOPATHY
CONDITION
AREA AFFECTED
VISUAL PROBLEMS
LOW VISION AIDS
TOXOPLASMOSIS
CONDITIONS
AREA AFFECTED
VISUAL DISTURBANCES
LOW VISION AIDS
ALBINISM
CONDITIONS
AREA AFFECTED
VISUAL DISTURBANCES
LOW VISION AIDS
RETINITIS PIGMENTOSA
CONDITIONS
AREA AFFECTED
VISUAL DISTURBANCES
LOW VISION AIDS
HISTOPLASMOSIS
CONDITIONS
AREA AFFECTED
VISUAL DISTURBANCES
LOW VISION AIDS
STARGARDT'S DISEASES
CONDITIONS
AREA AFFECTED
VISUAL DISTURBANCES
LOW VISION AIDS
ANIRIDIA
CONDITIONS
AREA AFFECTED
VISUAL DISTURBANCES
LOW VISION AIDS
GLAUCOMA (FIG. 3.5)
CONDITIONS
AREA AFFECTED
VISUAL DISTURBANCES
LOW VISION AIDS
NYSTAGMUS
CONDITIONS
AREA AFFECTED
VISUAL DISTURBANCES
LOW VISION AIDS
OPTIC ATROPHY
CONDITIONS
AREA AFFECTED
VISUAL DISTURBANCES
LOW VISION AIDS
COLOBOMA
CONDITIONS
AREA AFFECTED
VISUAL DISTURBANCES
LOW VISION AIDS
CATARACT
CONDITIONS
AREA AFFECTED
VISUAL DISTURBANCES
LOW VISION AIDS
RETINAL DETACHMENT
CONDITIONS
AREA AFFECTED
VISUAL DISTURBANCES
LOW VISION AIDS
KERATOCONUS
CONDITIONS
AREA AFFECTED
VISUAL DISTURBANCES
LOW VISION AIDS
4:
Magnification
RELATIVE SIZE MAGNIFICATION (FIG. 4.1)
RELATIVE-DISTANCE MAGNIFICATION (FIG. 4.2)
ANGULAR MAGNIFICATION
PROJECTION MAGNIFICATION
POWER OF MAGNIFICATION
PREDICTING MAGNIFICATION REQUIRED
DISTANCE MAGNIFICATION
NEAR MAGNIFICATION
MONOCULAR OR BINOCULAR MAGNIFICATION
5:
Types of Low Vision Aids
MAGNIFIER
GENERAL PRINCIPLES OF MAGNIFIER
TYPES OF MAGNIFIERS
HAND-HELD MAGNIFIER (FIG. 5.1)
FEATURES
STAND MAGNIFIER (FIGS 5.2 A AND B)
BAR MAGNIFIER (FIG. 5.4)
FRESNEL TYPE MAGNIFIER (FIG. 5.5)
TELESCOPES (FIG. 5.6)
BIOPTIC TELESCOPE (FIG. 5.7)
FULL FIELD TELESCOPE
TELEMICROSCOPES
MICROSCOPES
FULL FIELD MICROSCOPES
HALF EYE MICROSCOPES (FIG. 5.9)
BIFOCAL MICROSCOPES
CLOSED-CIRCUIT TELEVISION
6:
Non-optical Aids
LARGE PRINT
ILLUMINATION
BLACK FELT TIP PEN
TYPOSCOPES (FIG. 6.3)
READING STAND (FIG. 6.4)
VISORS AND CAPS
TALKING PRODUCTS
TACTILE PRODUCTS
NEEDLE THREADER (FIG. 6.7)
NOTEX (FIG. 6.8)
NIGHT VISION AID
PINHOLE SPECTACLE (FIG. 6.9)
ABSORPTIVE LENSES (FIG. 6.10)
POLARIZATION
MIRROR COATING
ANTIREFLECTION COATING
PSYCHOLOGICAL CLUES FOR COLOUR PREFERENCE
7:
Contact Lens: As Low Vision Aid
CONTACT LENS FOR HIGH MYOPES
CONTACT LENS FOR ALBINISM (FIG. 7.1)
CONTACT LENS FOR ANIRIDIA
CONTACT LENS FOR KERATOCONUS
CONTACT LENS FOR LOSS OF COLOR VISION (FIG. 7.2)
CONTACT LENS AS TELESCOPIC SYSTEM
8:
Field Expansion Aids
9:
Computer Assisted Devices
HARDWARE BASED LOW VISION AIDS
SOFTWARE BASED LOW VISION AIDS
VOCALIZATION OR SPEECH RECOGNITION SYSTEM
BRAILLE DISPLAY SYSTEMS
ASSESSMENT FOR COMPUTER ASSISTIVE DEVICES
SOFTWARES AVAILABLE TODAY
MAGic MAGNIFICATION SOFTWARE
JAWS
BIG SHOT SCREEN MAGNIFIER (FIG. 9.5)
ZOOM TEXT Xtra
MOBILE SPEAK TALKING MOBILE PHONE SOFTWARE
10:
Ocutech® Vision Enhancing Systems
ABOUT OCUTECH
FEATURES
OCUTECH VES® II (3X, 4X, 6X)
OCUTECH VES®-MINI (3X, 15 DEGREES)
FEATURES
OCUTECH VES®-K (3X, 4X, 6X)
FEATURES
OCUTECH USER TESTIMONIALS
11:
Orientation and Mobility Training
FUNCTIONAL ORIENTATION AND MOBILITY EVALUATION
MOBILITY AIDS AND TECHNIQUE
12:
Practice Management
EQUIPMENTS AND DEVICES
REFERRALS
LETTER WRITING
SCHEDULING THE PATIENT
LOAN SYSTEM
RECALL SYSTEM
FEES
13:
Practical Aspects of Low Vision
14:
Case Studies
AVIJIT DAS
CASE 1
EVALUATION FOR LOW VISION AIDS
DISCUSSION
CASE 2
EVALUATION FOR LOW VISION AIDS
DISCUSSION
CASE 3
EVALUATION FOR LOW VISION AIDS
DISCUSSION
Bibliography
WORK SHEET
WORK SHEET
INDEX
TOC
Index
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