Course: Sensory Evaluation

Class 2: Your Senses and Wine






A little physiology will help you understand some of the hows and whys related to evaluating wine appearance.

Turn Up the Light

The retina, located at the back of your eye on the inside surface, contains nerve cells called photoreceptors. There are two types of photoreceptors: cones and rods.

Cones are used in bright light conditions. They perceive color.

Rods are used in dim light. They do not perceive color.

Bright light is important for evaluating appearance; it helps you see the colors better. In dim light, colors appear gray.

Reflected Color

But why do we see different colors? The human eye perceives light, which comes in...

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