Dolphins have acute vision both in and out of the water. A dolphin's eye is particularly adapted for seeing under water.
▪️Bottlenose dolphins have a double slit pupil allowing for similar visual acuity in air and water. Their eyes are adapted to mitigate varying light intensities. Studies show that the visual acuity of dolphins is similar or below the range of many terrestrial animals. There is currently no reference that measures distance of visual capability.
▪️In air, certain features of the lens and cornea correct for the refraction of light caused by the transition from aquatic to aerial vision. Without this adaptation, a dolphin would be nearsighted in air.
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