Having an eye test tells you more than just whether you need glasses or not. It provides you with essential information on the health of your eyes. An extensive examination is carried out on the internal and external structures of your eyes. This is important because early signs of many underlying health conditions, such as diabetes can be identified. As well this, many other tests such as: checking how well your eyes work together (binocular vision tests), visual field analysis, colour perception tests and intraocular pressure measurements may also be performed. Our eye examinations usually last approximately 30 minutes but may take longer if additional tests are required.