$CATEGORY: Science - Khan Academy/10.Human Eye and Colourful World/10.Human Eye and Colourful World--The Human Eye

//Multiple Choice

What happens to the eye lens when focusing on a distant object? {
    ~The lens becomes thicker
    =The lens becomes thinner
    ~The lens remains unchanged
    ~None of the Above
}

Which of the following refers to the process by which the eye adjusts to focus on objects at different distances? {
    ~Near point
    ~Refraction
    =Accommodation
    ~None of the Above
}

The near point of a normal human eye is typically\: {
    ~1 cm
    =25 cm
    ~50 cm
    ~None of the Above
}

When focusing on a nearby object, the ciliary muscles\: {
    ~Relax
    =Contract
    ~Become inactive
    ~None of the Above
}

The far point of the human eye is usually\: {
    ~25 cm
    ~50 cm
    =Infinity
    ~None of the Above
}

//True or False

The lens becomes thicker when focusing on distant objects. {F}

Accommodation allows the eye to focus on objects at varying distances by changing the shape of the lens. {T}

The near point of the eye refers to the closest distance at which the eye can focus without strain. {T}

When focusing on distant objects, the ciliary muscles contract. {F}

The normal near point for the human eye is 50 cm. {F}

//Fill in the blanks



//Numericals



//Match the following

Match the following items from Column A with their correct corresponding options from Column B\:
{
=Accommodation -> Ability to change focus distance
=Focusing on distant object -> Lens becomes thinner
=Focusing on nearby object -> Ciliary muscles contract
=Near point -> Closest distance eye can focus
=Far point -> Relaxation of ciliary muscles
}


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