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The sensory disorientation of returning from a prolonged banking turn to wings-level flight can cause the pilot to re-enter the banking turn, as in the graveyard spin illusion. While the plane continues in the turn and begins to indicate a loss of altitude, the pilot will try to correct the loss of altitude by "pulling up" on the plane's controls.
If the left turn continues (~20 seconds or more), the pilot will experience the sensation that the airplane is no longer turning to the left. At this point, if the pilot attempts to level the wings this action will produce a sensation that the airplane is turning and banking in the opposite direction (to the right), a sensation commonly known ...
When one looks at the left edge, one will see a faint blue spike going from the light to the right. [11] A phosphene is the perception of light without light actually entering the eye, for instance caused by pressure applied to the closed eyes.
Additionally, retinal noise can be produced by touching near the rear of the eyeball producing pressure phosphenes (for example, if one closes one's eyes, looks all the way left, and lightly touches the rightmost part of the eye socket, this produces visual noise in the shape of a circle that appears at the left side of the visual field – a ...
Left-side attitude indicator failed and pilot kept turning his head to cross-check the right-side (co-pilot position) attitude indicator, leading to spatial disorientation; [20] the crash killed Missouri Governor Mel Carnahan. [21] Jan 3, 2004: Red Sea, near Sharm El Sheikh International Airport, Egypt: Flash Airlines Flight 604
The pain can ultimately become disabling unless the ambient pressure is reversed. The pressure difference causes the mucosal lining of the sinuses to become swollen and submucosal bleeding follows with further difficulties ventilating the sinus, especially if the orifices are involved. Ultimately fluid or blood will fill the space.
Intraocular pressure varies throughout the night and day. The diurnal variation for normal eyes is between 3 and 6 mmHg and the variation may increase in glaucomatous eyes. During the night, intraocular pressure may not decrease [ 17 ] despite the slower production of aqueous humour. [ 18 ]
In this state, if a person lies down with right cheek touching the ground, then the cupula in the left ear would float towards the left, creating an illusory sense of slow left-to-right head rotation. To compensate for this, the VOR moves the eyes towards the left slowly until it reaches the limit, and the eyes pull to the right rapidly ...