march 9, 2006driving with the bioptic telescope1 presented by dr. dennis kelleher california...
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March 9, 2006 Driving with the Bioptic Telescope 1
Presented By
Dr. Dennis Kelleher
California Department of Education
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What is a Bioptic TelescopeWhat is a Bioptic Telescope
Miniature apertureExpanded field (Keplerian)Standard field (Galilean)Magnification Range 1.7X to 6X2.2X, 3X & 4X most commonly used
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Bioptic Telescope AssortmentBioptic Telescope Assortment
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When is a Bioptic TelescopeWhen is a Bioptic Telescope Recommended for Driving?Recommended for Driving?
Visual Acuity of less than 20/80Visual Acuity of greater than 20/200Near normal peripheral visual fields of
at least 150 degreesNear normal eye motility
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Vision FactorsVision Factors to Considerto Consider
Static Visual Acuity Dynamic Visual Acuity Visual Fields Stable Eye Pathology Color Perception Depth Perception & Binocularity Contrast Sensitivity & Glare Recovery
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Vision Standards & Vision Standards & Guidelines Guidelines
Greater than 20/200 VA without Bioptic Minimum 20/40 Visual Acuity with Bioptic Minimum 150 Degree Visual Field Stable Eye Condition Contrast Sensitivity & Image Brightness Ability to Differentiate Color Ability to Track Objects Peripheral Vision in Both Eyes
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Vehicle Code 12805 (b) Vehicle Code 12805 (b)
The Department shall not issue a driver’s license to, or renew a driver’s license of, any person:
(b) Whose best corrected visual acuity is 20/200 or worse in that person’s better eye, as verified by an optometrist or ophthalmologist. No person may use a bioptic telescope or similar lens to meet the 20/200 visual acuity standards.
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Form DL 62 ReportForm DL 62 Report VA without lenses VA with standard lenses VA through Bioptic in better eye Date and type of most recent prescription Visual fields Diagnosis (cause of low vision) Prognosis (stability) Advice for re-exam, restrictions, lighting, glare. use
of other aids etc.
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Non-Visual Safety Margin Non-Visual Safety Margin FactorsFactors
Emotional Status Reaction Time & Mental Alertness Substance Abuse Inexperience & Over-Exposure Age Other Impairments A Need to Drive
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Bioptic Training SequenceBioptic Training Sequence
Locate Stationary Objects while Still Locate Moving Objects while Still Locate Moving Objects while Moving Develop Rapid, Accurate Perception Spatial Awareness & Memory Adjustments to various lighting
conditions Use of tracking cues
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Other Considerations for Other Considerations for Low Vision DriversLow Vision Drivers
Use Other Low Vision Devices Appropriately Know Where You Are Going in Advance Use Non-Visual Cues Be Attentive to Driving at All Times Drive During Less Demanding Conditions Impose Voluntary Self-Restrictions Periodic Professional Training
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Driving TasksDriving Tasks
Steering, Shifting & TurningSpeed Control & BrakingBacking Up and ParkingDepth PerceptionUse of MirrorsKnow Driving Laws & Use Courtesy
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Defensive Driving SkillsDefensive Driving Skills
Keep Your Eyes MovingSee the Entire PictureBe Sure You are SeenFollow at a Safe Distance (4 seconds)Anticipate what Other Driver(s) ActionLeave Yourself an Escape
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Effective Bioptic UseEffective Bioptic Use
Spotting DeviceVary Amount of Bioptic UseMaximizing Eye MovementScanning Driving Environment
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Indicators of Effective Indicators of Effective Bioptic UseBioptic Use
See traffic lights/stop signs, pedestrians in crosswalks through carrier lens
Spots & reads freeway signs within one second
Determines distance before intersection to spot for breaking
Varies use between freeways, residential & business areas
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RestrictionsRestrictions
Geographic AreaHours Specific RoadsSpecial Vehicle & EquipmentDriving to specific destinationsNo Restrictions
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Objections to Bioptic Objections to Bioptic Telescope UseTelescope Use
Restricted Visual Field through Bioptic Ring Scotoma Causing Blind Spot Vibration and Speed Blur Telescopic Parallax & Depth Perception Bioptic Use with Mirrors Sensitive Bioptic Frame Adjustments
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RESOURCESRESOURCES
Association for Driver Rehabilitation SpecialistsPO Box 49, Edgerton, WI 53534 (t) 608-884-8833(fax) 608-884-4851; http://www.driver-ed.org
BiOptic Driving Networkwww.BiOpticDriving.orgwww.BiOpticDriving.org.uk
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FOR MORE INFORMATIONFOR MORE INFORMATION
Dr. Dennis KelleherSpecial Education DivisionCalifornia Department of Education515 L Street Suite 270Sacramento, CA 95814916-327-0842 voice916-445-4550 [email protected]