Biology A-Level
visual acuity
What visual acuity means in Biology A-Level, as defined for AQA.
Definition of visual acuity
Check what you remember
Read the wording for your board, then hide it and explain visual acuity in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: AQA
High acuity arises because each cone usually connects to its own bipolar neurone, so adjacent cones send separate impulses and are resolved as two points.
Topics that use visual acuity
- Receptors (A-level only) (AQA A-Level)
Related terms
- colour vision
- deformation
- depolarisation
- generator potential
- receptor specificity
- spatial summation
- stretch-mediated sodium ion channels
- transduction
Using visual acuity in the exam
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