Vision

The eye selects a small fraction of __________ wavelengths and together with the brain, reconstructs the position, shape, colour and motion of each object we see around us.

electromagnetic

Visual acuity normalised to ideal vision is represented as __________.

6/6

The __________ are responsible for best visual acuity and are concentrated at the fovea.

cones

Light rays from __________ do not need as much refraction to bring them to a focus compared to rays from close objects.

distant objects

The __________ is an area in the retina that contains no photoreceptors and creates a blind spot.

optic disc

The nervous impulse in the optic chiasm is responsible for the crossover of information from the left and right __________ fields.

visual

RGC axons in the retina aren’t myelinated but become myelinated in the __________ due to oligodendrocytes.

optic nerve

The __________ visual pathway transfers information from the retina to the thalamus.

Central (lower) at

The term for the deficit in attention that impairs visual processing is known as __________ syndrome.

Balint's

When light causes opsin to isomerise retinal, it activates __________, which in turn activates phosphodiesterase (PDE).

Transducin

Phototransduction can be divided into two phases: the dark phase and the __________ phase.

light

Rods and cones don’t exclusively detect one distinct wavelength but a __________.

range

__________ refers to the difficulty most commonly associated with red-green colour blindness.

Opsin gene deficiency

The Lateral Geniculate Nucleus (LGN) is essential for normal visual __________.

perception

Pupillary responses are mediated by __________ RGCs, also referred to as melanopsin-containing RGCs.

intrinsic photosensitive

The __________ is measured as the distance from where you can accurately see the image to the point of focus.

depth of focus

The __________ cells transmit the graded signal to a neighbouring retinal ganglion cell (RGC) via glutamate release.

bipolar

Two point discrimination can be calculated using the formula _______________ .

d1=(x1.d2)/x2

The __________ visual pathways are responsible for the processing of motion, form, and color in the visual cortex.

Cortical (higher)