What is presbyopia? скачать в хорошем качестве

What is presbyopia?

Presbyopia: When you are looking at something that is far away, your eye – if you are perfect sighted – is shaped so that the object is clearly focused on your retina. This means that the image is clear. When you look at something close up, for example to read a book, the muscles inside your eye that surround the lens contract to make the lens change shape. This focuses the light from the book onto your retina. The lens inside a child’s eyes is elastic, and so can change shape easily to enable them to change focus from looking at something far away to looking at something close up. As we get older, however, the lens naturally stiffens and so it changes shape less easily. This means that we can no longer focus on things that are close to us and have to hold them further away to see them clearly. Visit our website to find out more: http://lookafteryoureyes.org/eye-cond... Follow us on social media: Facebook:   / lookafteryou.  . Twitter: https://twitter.com/your_eyes_UK?lang=en