Rods, Cones, and Light Practice Problems

Rods are for scotopic vision while cones are for:

Which of the following photopigments are found in rods and are responsible for vision in low-light conditions?

Which of the following conditions explains why children can hold their books closer than elderly people when reading?

What is the primary function of horizontal cells in the retina?

The structure that connects the lacrimal sacs to the nasal cavity is :-

The innermost layer of the eyes which has photoreceptors, is the

Which of the following is a lubricant produced by the tarsal glands that helps in the protection of the tear film?

When red light and green light are mixed together and viewed by the human eye, what color is perceived?

Why is the optic disc of the eye called a blind spot?

Which of the following happens at the slow phase of the dark adaptation process?

The movement of the medial rectus muscles that causes the eyes to move inward toward the nose is called:

The trabecular meshwork, which is responsible for draining the aqueous humor from the eye, is called:

Nearsightedness, or myopia, is a refractive error of the eye that makes it difficult to focus on:

What changes in the ciliary muscles and lens occur when seeing a distant object?

Grace is looking up at the plane in the sky from the roof when her sister comes yelling at her from downstairs, compelling her to look at her. What changes will her ciliary muscles and lens go through:

Eva suffers from hypermetropia, while her younger brother Jade suffers from myopia. Determine what types of corrective lenses they will require:

Why do motion-sick sailors prefer looking at the horizon rather than the immediate surroundings?

If a person gets a visual acuity rating of 20/20 that means his visual acuity is:

A circular region medial to the fovea centralis, where the axons of the ganglia converge, is referred to as:

Which of the following types of cells provides information to the brain about the wavelength of arriving photons?

What structure in the eye anatomy is referred to in the following illustration?

In the organization of the retina, the rods and cones are situated between the pigmented layer and:

The structure in the fibrous layer of the eyes that has no blood vessels is called:

The sclera of the eye's fibrous layer contains dense fibrous connective tissue that is made up of both collagen and fibers. This makes the sclera capable of providing:

What is the function of the lens in the pathway of light?

Which form of vitamin A is vital for eye sight and vision?

The oculomotor nerve is involved in controlling:

Which of the following parts of the human eye is nourished by the aqueous humor?

What is the primary purpose of the convergence of light in the eye?

The specific region of the retina where the optic nerve exits the eye is known as:

The vitreous humor is a transparent, jelly-like substance that occupies the space between the:

The process by which the eye adjusts the shape and curvature of the lens to focus on distant objects is called:

Which of the following conditions require concave lenses?

Which of the following alters lens curvature?

Which of the following is the middle layer of the eye wall?

Which of the following eye conditions might the patient be experiencing if they have symptoms such as blurred or distorted vision at all distances, eyestrain, headaches, and difficulty with night vision?

The specialized photoreceptors in the eyes that respond better to low light are known as:

The most abundant protein in the rod cells that absorb light is:

The part of the eye where only cones can be found:

Choose which statement about rods and cones is true: