![The ciliary muscles of eye control the curvature of the lens in the eye and hence and alter the effective focal length of the system. When the muscles are fully relaxed, the The ciliary muscles of eye control the curvature of the lens in the eye and hence and alter the effective focal length of the system. When the muscles are fully relaxed, the](https://www.vedantu.com/question-sets/f300e9f2-752f-4309-a926-08ec91c4998e7645820946480710383.png)
The ciliary muscles of eye control the curvature of the lens in the eye and hence and alter the effective focal length of the system. When the muscles are fully relaxed, the
![How Focal Length Affects Viewing Angle | Digital Camera Know-Hows | Digital Camera | Digital AV | Support | Panasonic Global How Focal Length Affects Viewing Angle | Digital Camera Know-Hows | Digital Camera | Digital AV | Support | Panasonic Global](https://av.jpn.support.panasonic.com/support/global/cs/dsc/knowhow/common/img/l12/l12_01.jpg)
How Focal Length Affects Viewing Angle | Digital Camera Know-Hows | Digital Camera | Digital AV | Support | Panasonic Global
![Explain how an eye lens changes its focal length. How does it help in seeing near and distant objects? Explain how an eye lens changes its focal length. How does it help in seeing near and distant objects?](https://byjus-answer-creation.s3.amazonaws.com/uploads/7890Physics_62a9f5c38a09ec5f9ec41022.jpg_img_upload_solution_2022-07-29%2010:04:51.541812.png)
Explain how an eye lens changes its focal length. How does it help in seeing near and distant objects?
![The focal length of a normal eye-lens is about:$(a){\\text{ 1mm}} \\\\(b){\\text{ 2cm}} \\\\(c){\\text{ 25cm}} \\\\(d){\\text{ 1m}} \\\\ $ The focal length of a normal eye-lens is about:$(a){\\text{ 1mm}} \\\\(b){\\text{ 2cm}} \\\\(c){\\text{ 25cm}} \\\\(d){\\text{ 1m}} \\\\ $](https://www.vedantu.com/question-sets/23766a8b-704b-4a02-9898-45078c04e63b6462374204689754885.png)
The focal length of a normal eye-lens is about:$(a){\\text{ 1mm}} \\\\(b){\\text{ 2cm}} \\\\(c){\\text{ 25cm}} \\\\(d){\\text{ 1m}} \\\\ $
![Explain how an eye lens changes its focal length. How does it help in seeing near and distant objects? Explain how an eye lens changes its focal length. How does it help in seeing near and distant objects?](https://byjus-answer-creation.s3.amazonaws.com/uploads/7890Physics_62a9f5c38a09ec5f9ec41022%20%20a.jpg_img_upload_solution_2022-07-29%2010:05:01.130748.png)