Accommodation is the constriction of the pupils when a patient focuses on an object held about 10 centimeters from the nose
When focused on an item held around 10 centimeters from the nose, the pupils should contract, which is correctly referred as as accommodation. Ptosis is the upper eyelid drooping rather than the pupils narrowing.
When focused on an item that is 10 cm away from the nose, glaucoma does not cause the pupils to contract. Instead, it damages the eye's optic nerve. Peripheral vision, not pupil constriction, is the portion of vision that happens away from the center of the gaze.
The pupil shrinks during the accommodation reflex to enhance the depth of focus of the eye by obstructing the light reflected from the cornea's edge. The lens subsequently becomes more biconvex, increasing its curvature and hence its refractive power.
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