glasses Archives - Resource Library - Sheffield Children's NHS Foundation Trust

What is myopia? Myopia (short sightedness) is a condition that causes distance objects to be blurred, while close objects are seen clearly. Myopia can be corrected with glasses, contact lenses or laser eye surgery in adults. Approximately 1 in 3 people are myopic. Symptoms usually appear in older...

It is important that you fit your prism in the correct orientation so please check the prism for where it is marked ‘BASE‘. In your case the prism needs to be positioned BASE OUT. This means that the part marked BASE needs to be positioned towards the arm of the glasses. You can also...

It is important that you fit your prism in the correct orientation so please check the prism for where it is marked ‘BASE‘. In your case the prism needs to be positioned ‘base in’. This means that the part marked ‘base’ needs to be positioned towards the nose...

What is astigmatism? Astigmatism, pronounced ‘ah-stig-mah-tism’, is a type of refractive error, like longsightedness (hypermetropia) and short sightedness (myopia). Refractive error means that the light coming into the eye cannot be properly focused because of the size or shape of the...