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In relation to the human eye, name and explain the role of each of the following: 1 - Leaving Cert Biology - Question 15 - 2018
Question 15
In relation to the human eye, name and explain the role of each of the following: 1. The fluid that fills the rear chamber. 2. The two types of light receptor cell... show full transcript
Worked Solution & Example Answer:In relation to the human eye, name and explain the role of each of the following: 1 - Leaving Cert Biology - Question 15 - 2018
Step 1
1. The fluid that fills the rear chamber.
Answer
The fluid that fills the rear chamber of the eye is called the vitreous humour. Its primary role is to maintain the shape of the eye and to support the retina by keeping it in place against the choroid. It also helps transmit light from the lens to the retina.
Step 2
2. The two types of light receptor cells.
Answer
The two types of light receptor cells are rods and cones.
- Rods are responsible for vision in dim light and are sensitive to low levels of light. They enable black and white vision or night vision.
- Cones operate in bright light and are responsible for color vision and visual acuity. They allow us to perceive color and detail.
Step 3
Step 4
Suggest an advantage to humans of having two eyes.
Answer
An advantage of having two eyes is the ability to perceive depth, also known as binocular vision. This enables humans to judge distances more accurately, which is crucial for activities such as driving, playing sports, and interacting with the environment.
Step 5
Name a disorder of the eye or of the ear and give a corrective measure for the disorder referred to.
Answer
One common disorder of the eye is myopia, or nearsightedness. A corrective measure for this condition is the use of concave lenses in glasses, which help to diverge light rays before they enter the eye, allowing for clearer vision of distant objects.