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The History of the use of light in Optometry

The History of the use of light in Optometry. Mark Eagle Behavioural Optometrist Irlen Diagnostician Cellfield Licensee. ElectroMagnetic Radiation. Visible light is only a small portion of the radiation spectrum. Light is an experience. Light as a treatment . Light as an environment.

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The History of the use of light in Optometry

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  1. The History of the use of light in Optometry Mark Eagle Behavioural Optometrist Irlen Diagnostician Cellfield Licensee

  2. ElectroMagnetic Radiation Visible light is only a small portion of the radiation spectrum

  3. Light is an experience

  4. Light as a treatment

  5. Light as an environment

  6. Light as a surgical tool

  7. Light as a trigger for action Vision Drives Action

  8. Light as a source of Information Vision Derives Meaning

  9. Light as a driver for Evolution

  10. Euglena with its eyespot

  11. Re-organisation of the eye spot into an eyeball

  12. Experimentation with many eyes The Compound eye

  13. Eye Movement

  14. Bi- Ocular

  15. Binocular

  16. Light brings detail

  17. Brightness Control

  18. Colour Perception

  19. Acuity - the ability to see detail

  20. Blur

  21. Image instability

  22. Refresh Rate

  23. Awareness of Doubleness

  24. Speed of data capture

  25. Light as a source of Stress

  26. Using the Light to communicate G g G gG gG gG gG gG g G gG gG gG gG gG gG g

  27. Using Light to imagine the future

  28. Light and Optometry’s use of light For examination not for treatment Mechanistic not Holistic Objective not Subjective Compensatory Lenses not Therapeutic Lenses Standardised tints not Customised tints

  29. Light and Irlen

  30. Bringing it together Light requires Eye movement, Bi- Ocular vs Binocular state, Image instability, Awareness of Doubleness Light brings detail Colour, Acuity, but requiresRefresh Rate, High Speed of data capture and good Brightness Control Light as a source of Stress Using the Light to communicate and to imagine the future Radiant Energy Light as a driver forEvolution Light as an experience • as a treatment • as an environment • as a therapy • as a mechanism for change Light as a source of Information and a key part of Language.

  31. Irlen Spectral Filters work ! Thankyou

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