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Understanding prescriptions

Laser eye surgery London

If you are looking for a laser eye clinic in London, then the London Vision Clinic should be on your shortlist.  

That may seem like a strong statement, but the London Vision Clinic emphasises that, in expert hands, laser eye surgery can be an extremely safe, life enhancing experience. More than 100,000 laser eye surgery procedures will be done in the UK this year. Read the guide to Laser Eye Surgery to help make the right choice for your eyesight.

Contact London Vision Clinic


Optometrists measure disorders of the eye, such as myopia, hyperopia, astigmatism, and Presbyopia in units called dioptres. Dioptres show the amount of correction you need to see normally. One dioptre is the equivalent of a lens that can focus on an object one metre away. The more short-sighted, longsighted, or astigmatic you are, the higher your prescription in dioptres. A typical prescription has three numbers such as -5.00 / -1.50 x 180.


The first number (-5.00) identifies your degree of short-sightedness or long-sightedness. The minus sign in front of the number identifies you as short-sighted. A plus sign shows you are longsighted.


The second number (-1.50) identifies your amount of astigmatism. This is written with either a plus sign or a minus sign (usually minus in the UK).


The third number (180) indicates the axis in degrees, indicating the direction of your astigmatism. An axis of 180 degrees, for example, means the astigmatism is horizontal.


A prescription of –5.00 /–1.50 x 180 indicates that the patient is moderately short-sighted, with a

moderate degree of astigmatism in a horizontal direction.

Get a quote

Get a quote for laser eye treatment

If you are looking for a quote for laser eye surgery, or want more information about treatment in your local area, you can complete the Laser Eye Surgery Enquiry Form. Your enquiry will be forwarded to a maximum of three clinics or providers of laser eye treatment who partner with the Private Healthcare UK web site.