Visual Acuity
This part of the eye changes shape to focus light on the retina.
What is the lens?
This vision condition occurs when the cornea is unevenly curved, causing blurred or distorted images.
What is astigmatism?
The three types of cone cells in the human eye are sensitive to red, green, and this third color.
What is blue?
This type of vision allows you to detect motion and objects on the edges of your visual field.
What is peripheral vision?
This clear, curved front part of the eye helps focus light as it enters.
What is the cornea?
In this condition, distant objects are seen clearly, but nearby objects appear blurry because the image forms behind the retina.
What is hyperopia (farsightedness)?
This area of the retina lacks photoreceptors and creates a gap in vision that your brain fills in automatically.
What is the blind spot?
This common type of color vision deficiency makes it difficult to distinguish between red and green.
What is red‑green color blindness?
Staring at a bright color for a long time and then seeing its opposite color when you look away is caused by this visual effect.
What is an afterimage?
This colored part of the eye controls how much light enters by adjusting the size of the pupil.
What is the iris?
When the eyeball is too long, causing distant objects to look blurry because light focuses in front of the retina, this condition is present.
What is myopia (nearsightedness)?
This principle explains how neighboring points on the retina correspond to neighboring neurons in the visual cortex.
What is retinotopic (visual) mapping?
This part of the eye contains photoreceptors that detect light and send visual information to the brain.
What is the retina?
This process explains afterimages when cone cells become fatigued and temporarily stop responding to certain colors.
What is sensory adaptation?
This structure focuses light onto the retina and changes shape to help you see objects at different distances.
What is the lens?
These muscles contract to make the lens thicker when you look at something up close.
What are the ciliary muscles?
This yellowish region of the retina is responsible for central vision and high visual acuity
What is the macula lutea?
This type of photoreceptor is responsible for vision in low‑light conditions but does not detect color.
What are rod cells (rods)?
The brain’s ability to judge distance and see the world in three dimensions is called this.
What is depth perception?
This light‑sensitive layer at the back of the eye contains rods and cones.
What is the retina?
This is the condition of a “normal” eye, where light focuses directly on the retina without corrective lenses.
What is emmetropia?
This part of the eye allows you to see fine details, such as reading small print or recognizing faces.
What is the fovea centralis?
Most forms of red–green color blindness are inherited through this type of genetic pattern.
What is X‑linked recessive inheritance?
This type of photoreceptor, concentrated away from the fovea, makes peripheral vision especially sensitive to movement and low light.
What are rod cells (rods)?
This clear, watery fluid fills the space between the cornea and the lens.
What is the aqueous humor?