$CATEGORY: Science - Khan Academy/10.Human Eye and Colourful World/10.Human Eye and Colourful World--Defects of Vision and Their Correction

//Multiple Choice

What is presbyopia? {
    ~Near-sightedness
    ~Far-sightedness
    =Age-related loss of accommodation
    ~None of the Above
}

What causes presbyopia? {
    ~Elongation of the eyeball
    ~Weakening of the eye muscles
    =Hardening of the lens with age
    ~None of the Above
}

Presbyopia is typically corrected using which type of lenses? {
    ~Concave lenses
    ~Convex lenses
    =Bifocal lenses
    ~None of the Above
}

Which of the following is a symptom of presbyopia? {
    ~Blurry vision at a distance
    =Difficulty focusing on close objects
    ~Double vision
    ~None of the Above
}

Presbyopia is a condition mostly seen in\: {
    ~Children
    ~Teenagers
    =Adults over 40 years
    ~None of the Above
}

//True or False

Presbyopia is a result of the eye’s inability to focus on distant objects. {F}

Presbyopia is a natural age-related condition that typically starts after the age of 40. {T}

Bifocal lenses have two parts, one for distant vision and the other for near vision, making them ideal for correcting presbyopia. {T}

The accommodation power of the eye remains the same throughout life. {F}

Presbyopia is caused by the elongation of the eyeball. {F}

//Fill in the blanks



//Numericals



//Match the following

Match the following items from Column A with their correct corresponding options from Column B\:
{
=Presbyopia -> Loss of accommodation power with age
=Bifocal lenses -> Used to correct presbyopia
=Loss of accommodation -> Hardening of the lens
=Ciliary muscles -> Help focus on near and distant objects
=Hardening of the lens -> Causes presbyopia
}


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