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  2. Emmetropia - Wikipedia

    en.wikipedia.org/wiki/Emmetropia

    Emmetropia is the state of vision in which a faraway object at infinity is in sharp focus with the ciliary muscle [1] in a relaxed state. That condition of the normal eye is achieved when the refractive power of the cornea and eye lens and the axial length of the eye balance out, which focuses rays exactly on the retina, resulting in perfectly sharp distance vision.

  3. Squint - Wikipedia

    en.wikipedia.org/wiki/Squint

    Squinting helps momentarily improve their eyesight by slightly changing the shape of the eye to make it rounder, which helps light properly reach the fovea. Squinting also decreases the amount of light entering the eye, making it easier to focus on what the observer is looking at by removing rays of light which enter the eye at an angle and ...

  4. Eye - Wikipedia

    en.wikipedia.org/wiki/Eye

    An eye is a sensory organ that allows an organism to perceive visual information. It detects light and converts it into electro-chemical impulses in neurons (neurones). It is part of an organism's visual system.

  5. Human eye - Wikipedia

    en.wikipedia.org/wiki/Human_eye

    The eye is made up of three coats, or layers, enclosing various anatomical structures. The outermost layer, known as the fibrous tunic, is composed of the cornea and sclera, which provide shape to the eye and support the deeper structures.

  6. Why Experts Say Knowing Your Face Shape Could Change Your ...

    www.aol.com/why-experts-knowing-face-shape...

    If your jawline measurements are smaller than your forehead and you have a pointed chin, you most likely have a heart-shaped face. Someone with this face shape will notice there's more "volume ...

  7. Visual acuity - Wikipedia

    en.wikipedia.org/wiki/Visual_acuity

    The definition of 6/6 is somewhat arbitrary, since human eyes typically have higher acuity, as Tscherning writes, "We have found also that the best eyes have a visual acuity which approaches 2, and we can be almost certain that if, with a good illumination, the acuity is only equal to 1, the eye presents defects sufficiently pronounced to be ...

  8. Heterophoria - Wikipedia

    en.wikipedia.org/wiki/Heterophoria

    Heterophoria occurs only during dissociation of the left eye and right eye, when fusion of the eyes is absent. If you cover one eye (e.g., with your hand) you remove the sensory information about the eye's position in the orbit. Without this, there is no stimulus to binocular fusion, and the eye will move to a position of "rest".

  9. Visual field - Wikipedia

    en.wikipedia.org/wiki/Visual_field

    The binocular visual field is the superimposition of the two monocular fields. In the binocular field, the area left of the vertical meridian is referred to as the left visual field (which is located temporally for the left, and nasally for the right eye); a corresponding definition holds for the right visual field.