Refraction Eye Test - the optometrist will check your vision either without spectacles, with your current spectacles or both. He or she then uses trial frame and lenses or computerised testing equipment to discover whether you are long or short-sighted and if you have astigmatism and if there is room for improvement from any current vision correction which you use.

The optometrist can determine whether lenses can be prescribed which will help you to achieve sharper or more comfortable vision.

They can also assess how well your eyes work together and if exercises or prism lenses are needed to improve your binocular vision. This can be important in judging distances, seeing fine detail or just visual comfort.

Your ability to change focus from far to near vision tasks will also be checked, to determine whether you would benefit from help with this.