![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
![A convex lens in a human eye adjusts its focal length based on the object position. If it can form a clear image on retina for objects as close as 25 cm A convex lens in a human eye adjusts its focal length based on the object position. If it can form a clear image on retina for objects as close as 25 cm](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/1661885/original_Picture11.png)
A convex lens in a human eye adjusts its focal length based on the object position. If it can form a clear image on retina for objects as close as 25 cm
![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
![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)