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Eye Care Center at the Southern California College of Optometry MaryAnn Walls Low Vision Center. Dr. Becky Kammer, Chief 714-449-7415 rkammer@scco.edu . What is Low Vision?. Patients may be blind or just partially sighted (visually impaired) 20/70 or worse in better eye

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eye care center at the southern california college of optometry maryann walls low vision center

Eye Care Centerat the Southern California College of OptometryMaryAnn Walls Low Vision Center

Dr. Becky Kammer, Chief

714-449-7415

rkammer@scco.edu

what is low vision
What is Low Vision?
  • Patients may be blind or just partially sighted (visually impaired) 20/70 or worse in better eye
  • Legally Blind is 20/200 or worse with best correction on
what can rehabilitative optometry do to help
What can Rehabilitative Optometry do to help?
  • Help patients see to read
  • Help patients see to drive
  • Help patients meet specific vision goals
main rehabilitation goal

Main Rehabilitation Goal

Improve independence and quality of life

how does the exam flow
How does the exam flow?
  • Patient’s come for at least 2-3 visits where a full eye exam is given and then devices are introduced to meet goals
  • First Visit: Team is introduced to patient
    • Occupational therapist
    • Student doctor
    • Faculty professor
  • OT will schedule a home evaluation before patient returns for second visit.
second visit
Second Visit
  • OT summarizes their home visit for Dr. and the second optometric visit is planned for the patient.
  • More visual goals are evaluated, devices are ordered
  • Possibly more training visits with OT are scheduled in the meantime
dispensing visit
Dispensing Visit
  • Patient’s glasses or devices are given to patient and basic training in office is provided
  • OT schedules 2-4 more home visits to make sure patient uses device correctly and is using residual vision correctly (eccentric viewing training if needed)
  • OT reports back to Dr. for follow up
exam components case history
EXAM COMPONENTSCase history
  • Summarize to obtain basic goals
    • Sustained Near: Reading continuous text
    • Spotting Near: Seeing bills, shopping
    • Sustained Distance: Watching TV
    • Spotting Distance: Driving, seeing signs
    • Illumination and Glare: often need enhanced contrast indoor, need better lighting indoor
exam components functional visual acuities
EXAM COMPONENTS Functional visual acuities
  • Distance Vision
    • Feinbloom chart (Designs of Vision)
  • Near Vision
    • Single digit chart (M notation – Lighthouse charts)
    • Continuous text chart (M notation - Lighthouse)
exam components functional visual fields
EXAM COMPONENTS Functional visual fields
  • Several tests available to help determine how much usable vision is present
  • Nystagmus patients usually have full fields
    • This is great for rehabilitation processes
exam components contrast sensitivity
EXAM COMPONENTS Contrast sensitivity
  • Testing is critical for determining if low contrast objects can be seen in dim lighting
  • Poor contrast sensitivity may slow down reading or cause problems driving at night…
exam components binocularity
EXAM COMPONENTS Binocularity
  • Functional considerations
    • Depth perception up close (3D)
      • Many nystagmus patients have no depth perception (or true binocularity)
    • Most Low Vision patients are functionally monocular
exam components a few treatment options
EXAM COMPONENTS A Few Treatment options
  • Spectacle plane – high plus/microscope
  • Loupe – Hand magnifier, stand magnifier, head mounted
  • Telescopes
  • Electronic devices
  • Filters/lighting
glare treatment
Glare Treatment
  • Various colored filters (lens tints)
    • NoIR
    • Corning
    • Plastic Photochromic (Chadwick Optical)
    • Cocoon’s
nonoptical aids
Nonoptical aids
  • Relative Size Devices: Large Print Books
  • Posture and Positioning Devices: Lap boards
  • Writing Devices:Felt tip pens
  • Medical Devices: Talking glucometers
  • Mobility Devices: Cane, Dog guide
  • Sensory Substitution Devices: Talking clocks
referrals
Referrals
  • Orientation and mobility
  • Visual impairment instructor – independent living skills
  • Department of Rehabilitation
  • Support Groups/counseling
  • Braille Institute for ILS classes
what s new in lv
What’s new in LV?
  • Computer technology with adaptive software
  • Volunteer at ECC provides one-on-one computer appointments for low vision patients
what s on the horizon for lv
What’s on the horizon for LV?
  • Blind Art Exhibit in September 05
  • Research
    • SCCO is now part of a progressive group that is attempting to initiate clinical trials in the U.S.
    • Completion of a small multi-center study with hemianopic patients