Answer:
Diplopia
Explanation:
Diplopia, also called double vision, happens when the eyes are not aligned correctly, transmitting images of the same object to the brain, but from different angles. People with diplopia cannot fuse images from both eyes into a single image, creating the sensation that two objects are being seen instead of one; or they need to point their eyes inward to focus on an object.
Of all the vision disorders, diplopia is perhaps one of the most troublesome - and identifying its cause is a challenge. Diplopia happens when the eyes have a discrepancy between them and send images of the same object to the brain from different angles, so that it cannot understand them as the same and cannot merge them into one, causing vision double.
Viruses can be spread by physical contact and if you don’t wash yours hands.
Fever, Sore Throat, Headache, Fatigue, Muscle Weakness, Swollen Tonsils, Night Sweats, Swollen lymph glands in the neck and armpit.
The upstroke, when the wing is partially flexed also creates lift, but arrests forward movement. As a general rule the slower a bird is flying, the further it'll push it's wings forward in the down-stroke to generate extra lift and the faster a bird is flying the less it'll push it wings forward.
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