A driver who has been drinking alcohol is operating a vehicle on a unlit rural road at night. As an oncoming vehicle approaches with high beams, the driver notices it takes significantly longer than normal for their eyes to adjust after the oncoming car passes, while also struggling to detect objects entering the roadway from the side shoulders. Which specific physiological visual impairment caused by alcohol consumption directly accounts for these combined vision failures?
- AIntoxication speeds up pupil adaptation rates to light contrast but suppresses central visual acuity, limiting focal perception.
- Alcohol impairs eye muscle control, resulting in reduced peripheral vision (tunnel vision) and slower glare recovery time.Cevap
- CAlcohol enhances night vision sensitivity by dilating pupils permanently, though it degrades color perception.
- DAlcohol primarily damages depth perception while leaving peripheral vision and glare adaptation unaffected.
Cevap
Alcohol impairs eye muscle control, causing reduced peripheral vision (tunnel vision) and delayed glare recovery time.
The correct response accurately identifies that alcohol relaxes the delicate muscles controlling eye movements and light adaptation. This leads to a narrowing of the driver's visual field (peripheral vision loss or tunnel vision) and impairs the pupil's ability to adjust quickly after exposure to bright glare.
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Impact of Alcohol on Visual Processing and Glare Recovery