--- title: The optician and glasses — a lesson of Mova's school · trees and pragmatics description: «The optician and glasses», a lesson of the medicine course of Mova's primary school, sentence by sentence with dependency trees and pragmatics. It begins: Your eye is like a camera: the clear front and the lens bend light so it focuses in a sharp picture on the retina at the back. --- [Mova](https://md.mova.elamur.ai/free/en/) · [this page in HTML](https://mova.elamur.ai/free/en/corpora/school/medicine/27-the-optician-and-glasses/) [home](https://md.mova.elamur.ai/free/en/) / [corpora](https://md.mova.elamur.ai/free/en/corpora/) / [school](https://md.mova.elamur.ai/free/en/corpora/school/) / [Medicine](https://md.mova.elamur.ai/free/en/corpora/school/medicine/) / The optician and glasses # The optician and glasses Lesson 27 of the medicine course of Mova's primary school: 15 sentences, each with its syntax tree and pragmatics. The lessons are written for Mova, and their agreed trees are part of Mova corpus 0.4 (CC BY-SA 4.0). How Mova does on its tests: [the lesson at school](https://md.mova.elamur.ai/free/en/school-run/medicine/27-the-optician-and-glasses/). - [0](https://md.mova.elamur.ai/free/en/corpora/school/medicine/27-the-optician-and-glasses/0/) — Your eye is like a camera: the clear front and the lens bend light so it focuses in a sharp picture on the retina at the back. - [1](https://md.mova.elamur.ai/free/en/corpora/school/medicine/27-the-optician-and-glasses/1/) — In a short-sighted eye the picture lands just in front of the retina, so the board at school is a blur while the book on your desk is crisp. - [2](https://md.mova.elamur.ai/free/en/corpora/school/medicine/27-the-optician-and-glasses/2/) — An optometrist finds out with letter charts, lights and lenses, and glasses bend the light a little more or less so the picture lands right on the retina again. - [3](https://md.mova.elamur.ai/free/en/corpora/school/medicine/27-the-optician-and-glasses/3/) — Glasses don't weaken your eyes or make them lazy; many children wear them, and the first day with them can feel like someone turned up the sharpness of the whole world. - [4](https://md.mova.elamur.ai/free/en/corpora/school/medicine/27-the-optician-and-glasses/4/) — Short sight, or myopia, means far things look blurry and near things clear, because the eye focuses light in front of the retina. - [5](https://md.mova.elamur.ai/free/en/corpora/school/medicine/27-the-optician-and-glasses/5/) — An optometrist tests vision with a letter chart whose lines get smaller, then looks into the eye and uses lenses to find the right prescription. - [6](https://md.mova.elamur.ai/free/en/corpora/school/medicine/27-the-optician-and-glasses/6/) — Glasses lenses bend light so it focuses on the retina, and wearing them does not make eyes worse. - [7](https://md.mova.elamur.ai/free/en/corpora/school/medicine/27-the-optician-and-glasses/7/) — Children's prescriptions often change as they grow, so regular eye tests matter. - [8](https://md.mova.elamur.ai/free/en/corpora/school/medicine/27-the-optician-and-glasses/8/) — In the UK children under 16 get free NHS eye tests and vouchers towards glasses, and tests are worth having every year or two even without a problem. - [9](https://md.mova.elamur.ai/free/en/corpora/school/medicine/27-the-optician-and-glasses/9/) — A lazy eye, or amblyopia, means one eye has not developed sharp vision, and covering the good eye with a patch makes the brain use the weaker one; treatment works best in early childhood, and if it's left untreated the weak eye's sight can stay poor for life. - [10](https://md.mova.elamur.ai/free/en/corpora/school/medicine/27-the-optician-and-glasses/10/) — A squint, or strabismus, is when the eyes don't line up, and orthoptists, eye workers who help with squints and lazy eyes, may suggest glasses, patches or an operation. - [11](https://md.mova.elamur.ai/free/en/corpora/school/medicine/27-the-optician-and-glasses/11/) — Eye drops can widen the pupils so the optometrist can see inside the eye, and the blurriness wears off after a few hours; wide pupils let in more light, so bright sun can feel dazzling until then. - [12](https://md.mova.elamur.ai/free/en/corpora/school/medicine/27-the-optician-and-glasses/12/) — Colour blindness is usually inherited, is much more common in boys, and most often makes red and green hard to tell apart. - [13](https://md.mova.elamur.ai/free/en/corpora/school/medicine/27-the-optician-and-glasses/13/) — A cataract is when the lens inside the eye becomes cloudy, usually with age, and surgeons replace it with a clear plastic lens in a short operation; cataracts are not catching and don't spread like a cold. - [14](https://md.mova.elamur.ai/free/en/corpora/school/medicine/27-the-optician-and-glasses/14/) — Teasing about glasses is unkind and teachers deal with it; glasses are common and many famous people wear them. - ← previous: [Emergencies: ambulance, 999 and A&E](https://md.mova.elamur.ai/free/en/corpora/school/medicine/26-emergencies-ambulance-999-and-a-and-e/) - next →: [The hospital ward, operations and anaesthetic](https://md.mova.elamur.ai/free/en/corpora/school/medicine/28-the-hospital-ward-operations-and-anaesthetic/) - ↑ back to [Medicine](https://md.mova.elamur.ai/free/en/corpora/school/medicine/)