Approximately • Center • Central • Clearly • Contributes • Degrees • Depends • Detecting • Does • Edges • Effective • Either • Entirely • Equally • Even • Exclusively • Extent • Greater • Greatly • Improved • Improves • Information • Level • Line • Lit • Low • Motion • Nerve • Opposed • Outer • Outside • Overcome • Part • Perception • Play • Refers • Responsible • Retina • Role • Same • See • Significantly • Solely • Surroundings • Tasks • Training • Unaffected • Varies • While • Yes