Teaching Students with Visual Impairments
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      • Making the iOS Device Accessible
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      • Word Processing and Shortcuts
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      • Apps for Accessing Books
      • Identification Apps
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LENSES

Picture girl wearing glasses
By: Carmen Willings
teachingvisuallyimpaired.com

Reports should indicate what a student's uncorrected and corrected visual acuities are. If a student's vision can be corrected, even mildly, they will typically be prescribed glasses or contacts. 

Why were the glasses prescribed?

It is important to know why the glasses have been prescribed. Correcting a refractive error (such as myopia or hyperopia) is only one of the reasons that these may be prescribed. ​Glasses may be prescribed with a prism for a muscle imbalance or they may be recommended to protect the eyes. If the glasses are prescribed for near, they should be removed for distance viewing and vice versa if recommended by the doctor (some students will be able to leave them on as it will not have a significant impact). Glasses that are prescribed for myopia, or nearsightedness, will have a minus lens. Glasses prescribed for hyperopia will have a plus lens.

Types of Lenses

​The type of lenses that are prescribed can tell you a lot about the student's eye condition. The stronger the lens, the more significant the uncorrected vision. Keep in mind that even if a student is prescribed glasses, it doesn't necessarily mean that the student's vision can be fully corrected. This is because glasses cannot correct all types of visual impairments.

A convex, or plus lens

A convex lens bulges outward, converges light rays and increases the size of an image being viewed. A plus lens directs light rays entering the eye so they focus on the retina instead of behind the retina as convex lenses correct hyperopia, a condition in which the eye is underpowered. Lens power that is greater than +12D could mean that the student has no crystalline lens (due to cataract surgery or aphakia) or the student has extreme farsightedness.

A concave, or minus lens

A concave lens bulges inward, diverges light rays and decreases the size of the image received or can be used to converge light rays so that they focus on the retina, rather than in front of it. A very strong minus lens indicates extreme nearsightedness, also referred to as high myopia.

Plano lenses

A plano lens does not bulge inward or outward and is not for correction in eyeglasses. A student may be prescribed plano lenses if they have no vision in one eye and the lens is used to "balance" the prescription for the other eye. It may also be used for cosmetic reasons or for safety reasons.

Prism Lenses

Prism lenses are often prescribed for persons who have strabismus for the purpose of redirecting the rays of light entering the eye. Prisms may also be used for persons with visual field neglect to cue the person that additional information exists in the neglected field.

​Other Terms...

  • The sphere is the amount in diopters of correction to sharpen vision to best correction.
  • The cylinder power is the amount of lens power needed to correct astigmatism.
  • The axis is a number that indicates location of cylinder power in lens for astigmatism. 
  • Prism is added to some prescriptions to compensate for eye alignment problems.
  • Base refers to the location of the thickest edge of the prism and direction it redirects light. 

Sample Eyeglasses Prescription

 
 
Sphere
Cylinder
Axis
Prism
base
Distance
OD
-3.75
 
 
0.5
down
 
OS
-4.25
-0.50
180
0.5
up

Learn More...

All About Vision

Gary Heiting, OD has written a great article for All About Vision entitled "How to Read Your Eyeglass Prescription." This information can be very helpful when interpreting the eye report!

FREE VI Program Templates

Picture of VI program brochures.
Become a member for FREE to access the Printable VI Program Templates  to support your district's vision program. Includes VI Program resources, FVE/LMA templates and NEW Sample FVE Reports ebook. Simply click on Log In|Register in the navigation bar at the top of the page and follow the directions to register and create your password. ​

Post a Job 

Job Posting on Post-It Note
Due to the nationwide shortage of vision professionals, it can be challenging to locate personnel. Announce a job vacancy on the Job Exchange of Teaching Students with Visual Impairments, an online listing of jobs specific to the visual impairment field.

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Apps for VI
Braillewriter Repair
AT Resources
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  • Home
    • Site Map
    • About
    • FAQs
    • Newsletter
    • Printables
    • Presentations >
      • Conducting a FVELMA
      • Selecting the Right AT
      • Classroom AT for VI
      • Get Out of ECC Rut
      • Itinerant Teaching Strategy and Tips
  • VI Jobs
    • Post a Job
    • New Orleans, Lighthouse Louisiana
    • Colorado Springs, CO
    • Equal Eyes throughout NC
    • Tampa Lighthouse for the Blind
    • TBVI/COMS in NC and MN
    • Vision Institute of SC
    • Washington DC Metro Area
  • Program
    • Professional Practice >
      • Professional Development
      • Teacher Standards
      • Professional Ethics
      • Itinerant Teaching Tips
      • VI Program Handbook
      • Year at a Glance
      • Federal Quota Funds
      • Deaf-Blind Child Count
      • Caseload Analysis
      • Role of the Classroom Teacher
      • Simulation Activities
      • Social Etiquette
    • Vision Professionals >
      • Become a Vision Professional
      • Professional Preparation Programs
      • Teacher of Students with Visual Impairments
      • Orientation & Mobility Specialist
      • Low Vision Specialist
      • Rehabilitation Specialists
      • CATIS
      • Paraprofessionals & Braille Transcribers
    • Program Resources >
      • VI Organizations
      • Braille Resources
      • Deaf-Blind Resources
      • Support Networks
      • Journal Resources
      • State SpEd Agencies
      • Schools for the Blind
      • Georgia Vision Resources
    • V.I. Book Resources >
      • VI Resource Books
      • Braille Book Resources
      • Children's Books
      • Young Reader Books
      • Books about Dog Guides
      • Non-Fiction
      • Helen Keller Books
    • Parent Resources >
      • Online Parent Resources
      • Parent Resource Books
      • Grief & Suffering Books
      • Financial Assistance
      • Home Adaptations
      • Summer Reading (braille)
      • Summer Outdoor Activities
      • Rainy Days Activities
      • Camps for VI
    • History of Visual Impairments >
      • National Agenda
      • Legislation
      • Timeline of VI
      • Biblical Passages Concerning Blindness
      • Notable People
      • Helen Keller
      • History of Braillewriters
  • Service
    • Referrals >
      • Vision Concerns
      • Vision Classifications
      • Referral Process
      • Eligibility Guidelines
      • Vision Therapy Controversy
      • When Student Doesn't Qualify
    • Vision Exams >
      • Medical Professionals
      • Vision Tests & Tools
      • Visual Acuity
      • Lenses
      • Visual Fields
      • Structure & Function of the Eye
      • Common Vocabulary
      • Common Visual Impairments
      • Cortical Visual Impairments
      • Convergence Insufficiency (CI)
      • Deaf-Blind
    • FVE LMA >
      • What is the FVE
      • Interpret the Eye Report
      • FVE Observations
      • Interviews
      • Assessment Kit Materials
      • Oculomotor Skills
      • Near Visual Acuities
      • Print Comparisons
      • Distance Acuity
      • Test Visual Fields
      • Vision Skills
      • Learning Media Assessment
      • Reading Rates
      • Writing the FVE Report
    • Other Evaluations >
      • Clinical Low Vision Evaluation
      • Orientation & Mobility Evaluation
      • Impact on Development & Learning
      • Educational Assessments
      • Language Development
    • IEPs >
      • ECC Annual Needs
      • Writing SMART Goals
      • Blooms Taxonomy
      • Goal Bank >
        • Compensatory Goals
        • Sensory Efficiency Goals
        • Assistive Technology Goals
        • Social Skills Goals
        • Independent Living Goals
        • Recreation & Leisure Goals
        • Self Determination Goals
        • Career & Vocational Goals
      • Accommodations & Modifications
      • Service Delivery Models
      • Least Restrictive Environment
      • Student Led IEPs
    • Transition Plans
    • 504 Plans
  • Adaptations
    • Unique Visual Needs
    • Instructional Adaptations >
      • Movies & Assemblies
      • Lectures & Instruction
      • Board Work (Chalk, Interactive, White)
    • Material Adaptations >
      • Accessible Educational Materials
      • Photocopying
      • Font Legibility
      • Increase Contrast
      • Pictures and Worksheets
    • Environmental Adaptations >
      • School Campus Adaptations
      • Classroom Design Tips
      • Labeling System
      • Adjust Lighting
      • Playground Adaptations
    • Electives Adaptations >
      • Art
      • Art Materials
      • Music
      • Music & Movement
      • Dance
      • P.E. Adaptations
      • P.E. Resources
      • Home Economics
    • Early Intervention
    • Early Childhood >
      • Daily Schedule
      • Morning Meeting
      • Weather Check
      • Dramatic Play
      • Blocks
    • Math Adaptations >
      • Numbers & Counting
      • Algebra
      • Geometry & Spatial Sense
      • Measurement & Data
    • Literacy Adaptations >
      • Early Literacy Experiences
      • Reading Efficiency
    • Science Adaptations >
      • Science Materials
    • Social Studies Adaptations >
      • Social Studies Materials
  • ECC
    • Compensatory >
      • Guiding Principles of Concept Development
      • Community Based Experiences
      • Concepts to Teach
      • Organization & Study Skills
      • Tactile Graphics Guidelines
      • Tactile Graphics Instruction
      • Creating Tactile Graphics
      • Cranmer Abacus Instruction
    • Communication Modes >
      • Large Print
      • Braille Code
      • Braille Instruction
      • Braille Instruction Materials
      • Writing Braille
      • Create Tactual Books
      • Nemeth Braille Code
      • Signature & Handwriting Instruction
    • Students with MD >
      • Functional Skills
      • Individual Schedules & Communication Cards
      • Transition Between Activities
      • Lightbox Use
      • Encourage Use of Vision in Students with MD
      • Sensory Activities for Students with MD
      • Teacher Made Materials for Students with MD
      • Sensory Areas & Rooms
    • Sensory Efficiency >
      • Sensory Input
      • Sensory Table
      • Visual Efficiency Skills
      • Visual Attend and Scan Activities
      • Visual Tracking Activities
      • Visual Discrimination Activities
      • Visual Motor Activities
      • Optical Device Use
      • Tactual Readiness
      • Developing Skillful Hands
      • Auditory Readiness
      • Listening Skills Instruction
    • Independent Living >
      • Responsibility & Independence
      • Hygiene & Grooming
      • Dressing & Clothing Management
      • Mealtime Independence
      • Housekeeping
      • Money
      • Time Management
      • Food Preparation
    • O&M >
      • Proper Guide Techniques
      • Orienting Student to Environment
      • Mobility Skills
      • Travel
      • Dog Guides
    • Career Edu. >
      • Learn to Play
      • Classroom Jobs
      • Career & Vocational
      • Preparing for College
    • Social Skills >
      • Non-Verbal Communication
      • Social Interactions
      • Self Concept
      • Icebreakers & Mixers
    • Recreation & Leisure >
      • Recreation & Leisure Resources
    • Self Determination
    • Teaching in Thematic Units
  • Assistive Tech
    • Overview of Assistive Technology
    • Assistive Technology Assessment
    • Types of VI AT >
      • Non-Optical Low Vision Devices
      • Low/Medium Tech Devices for Tactual Learners
      • Optical Devices for Near
      • Optical Devices for Distance
      • Video Magnifiers
      • Screen Enlargement & Readers
      • Braille Technology
      • Tactile Graphics Technology
      • Auditory Access Devices
    • AT Instruction >
      • iPads as Instructional Tools
      • Making the iOS Device Accessible
      • Video Magnifier Instruction
      • Notetaker Instruction
      • Accessing Audio Books
      • Navigate Computer without a Mouse
      • Word Processing and Shortcuts
      • Keyboarding Instruction
    • Apps for VI >
      • Note Taking Apps
      • Apps for Accessing Books
      • Identification Apps
      • Navigation & Location Apps
      • Braille Apps
      • Magnifier Apps
      • Sound Making Apps
      • Cause & Effect Apps
      • Vision Skills Apps
      • Apps for Early Learning
      • Read to Me Story Apps
      • Apps for Communication
      • Android Apps for VI
    • Braillewriter Repair
    • AT Resources
    • Vendors
✕