QCAA Psychology Sensation and perception

Presbyopia is a natural part of the aging process where the lens gradually loses its elasticity and ability to change shape, typically becoming noticeable around age 40.

While presbyopia is a medical condition, it is considered a normal physiological change resulting from aging rather than a disease caused by pathogens or systemic illness.

Injuries typically cause acute damage to the eye, whereas presbyopia is a gradual, progressive hardening of the lens that occurs naturally over time.

While genetics may influence the specific timing of onset, the condition itself is a universal consequence of the aging process affecting the lens proteins.

The Ponzo illusion is a geometrical-optical illusion where identical lines appear to be different lengths due to converging lines that provide depth cues (linear perspective), rather than being a figure interpreted as a 3D object.

Impossible figures, such as the Penrose triangle, are two-dimensional drawings that the visual system automatically interprets as three-dimensional objects, even though their geometry is physically impossible in 3D space.

Ambiguous figures, like the Necker cube or Rubin vase, are visual stimuli that induce bistable perception, meaning the viewer can switch between two or more distinct interpretations of the image.

The Müller-Lyer illusion involves the misperception of the length of two identical lines based on the orientation of arrowheads at their ends, which is a distortion of size rather than a 3D object interpretation.