Refers to both eyes as a pair. Common in medical, anatomical, or descriptive contexts.
He gazed at the distant mountain with both eyes.
He injured both eyes in the accident.
Viewing with both eyes gives a sense of depth.
The doctor measured the visual acuity of both eyes.
She closed both eyes and prayed.
両眼 refers to both eyes together, whereas 片目 refers to only one eye.
両眼 is the general term for 'both eyes', while 双眼 is a more technical prefix used mainly in compounds like 双眼鏡 (binoculars).
binocular vision
Compound of 両 (both) and 眼 (eye). The reading りょうがん follows standard on'yomi.