28 Questions
What are the three planes in which the human eye can move?
Vertical plane, horizontal plane, and circular plane
How does the brain interpret the image sent by the retina?
The optical area of the brain interprets it as an upright one.
What two eye defects can be identified in vision due to the eye ball becoming short or long?
Long sight (hypermetropia) and short sight (myopia)
How can the defect of short sight (myopia) be corrected?
By using a concave lens
What is binocular vision?
The ability to maintain visual focus on an object with both eyes creating a single visual image.
Describe stereoscopic vision.
The ability of the eye to determine the depth or height of an object.
What is a cataract?
A cloudiness or opacity in the normally transparent crystalline lens of the eye.
What is glaucoma and what can cause it?
Glaucoma is a disease that gradually reduces the visual range of the eye and can lead to blindness due to damage of the optic nerve. It is usually the result of high blood pressure inside the eye.
What are some precautionary measures to prevent eye health problems?
Protect eyes from harmful light rays, avoid looking directly at the sun, wear safety glasses when welding, avoid using eye drops without medical advice, avoid using someone else's spectacles, and follow medical advice when using sunglasses.
Why is it important to detect glaucoma at an early stage?
By detecting glaucoma early, further increase of the condition can be controlled.
What is the correct relationship between the curvature of the eye lens and the focal length for a distant object?
The curvature of the eye lens should be reduced for a distant object
What type of lens is used to correct the defect of short sight (myopia)?
Concave lens
Why does a person with long sight (hypermetropia) have difficulty seeing close objects clearly?
The curvature of the eye lens is too low
In which type of lenses is the focal length relatively low?
High-convex lenses
What is the primary function of binocular vision?
To determine the depth and distance of an object
Which of the following is a common cause of cataract?
Denaturing of proteins in the eye lens
What is the primary reason for the gradual reduction of the visual range in glaucoma?
Damage to the optic nerve
Why is it important for a person with diabetes to be vigilant about developing glaucoma?
Diabetes can damage the optic nerve
What is the significance of detecting glaucoma at an early stage?
To control further increase of glaucoma
How does binocular vision contribute to stereoscopic vision?
By combining images from both eyes to determine depth and height
what is image distance?
the distance from the lens to the retina
what part of the brain interprets it as an upright image?
the optical area of the brain
what are the three layers seen in the eye?
the sclerotic layer, Choroid and retina
how can we clearly see an object close by or far away?
the lens of the eye has the ability to increase or decrease its curvature to the required size.
The eyes of a human, monkey, chimpanzee, gorilla and lorris are located in the front portion of the skull.
True
what is binocular vision?
the ability to maintain a visual focus on an object with both eyes creating a single visual image.
glaucoma is mostly due to?
fluid pressure in the eye
The damage caused by glaucoma to the eye can be reversed.
False
Study Notes
Eye Movement and Anatomy
- The human eye can move in three planes: horizontally, vertically, and rotationally.
- The eye has three layers: sclera, choroid, and retina.
Vision and Image Interpretation
- The brain interprets the image sent by the retina as an upright image in the occipital lobe.
- The image distance is the distance between the lens and the image formed.
Eye Defects and Corrections
- Short sight (myopia) occurs when the eyeball is too long, and can be corrected with concave lenses.
- Long sight (hypermetropia) occurs when the eyeball is too short, and can be corrected with convex lenses.
- A person with long sight has difficulty seeing close objects clearly.
Binocular Vision and Stereoscopic Vision
- Binocular vision is the ability to use both eyes together to see the world.
- Stereoscopic vision is the ability to see the world in 3D due to the difference in images between the two eyes.
- Binocular vision contributes to stereoscopic vision by allowing the brain to calculate depth cues.
Eye Disorders
- A cataract is a clouding of the lens in the eye that affects vision.
- Glaucoma is a condition that damages the optic nerve, often due to increased pressure in the eye.
- Glaucoma can cause a gradual reduction of the visual range if left untreated.
Prevention and Importance of Early Detection
- Precautionary measures to prevent eye health problems include regular eye checks and protecting eyes from injury.
- Early detection of glaucoma is important to prevent irreversible damage to the optic nerve.
- People with diabetes should be vigilant about developing glaucoma due to increased risk.
Lens and Focal Length
- The curvature of the eye lens should be such that the focal length is equal to the distance of the object.
- Concave lenses are used to correct short sight, and convex lenses are used to correct long sight.
- Convex lenses have a relatively low focal length.
Test your knowledge about the anatomy and function of the human eye. This quiz covers topics such as eye muscles, movement of the eyeball, optic region, retina, optic nerve, brain interpretation, and the properties of the eye lens.
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