Eye examination Haarlem
An eye test is an examination that measures visual acuity and the condition of the eye. The results of the test are used to make eyeglass lenses. If the details of the old glasses are known, these can be used as a starting point, which makes the test much quicker. The test is carried out using various instruments, a refractor or trial frames. The examination can be performed by an ophthalmologist, an optometrist, or an optician. The purpose of an eye examination is to determine whether there are any problems with vision and whether a correction is needed, such as glasses or contact lenses.
What tests do we perform?
- Identifying vision problems – Anamnesis interview to investigate the symptoms you are experiencing.
- Objective eye measurement – Automatic eye measurement within one minute.
- Eye pressure measurement – Measuring eye pressure to rule out glaucoma. If there are any doubts, we will refer you to an ophthalmologist.
- Determining visual acuity – Visual acuity test to determine what percentage you can see.
- Subjective eye examination – Thorough eye examination to measure the strength.
- Binocular testing – Testing the cooperation between the eyes.
- Reading strength – If necessary, this is also determined.
What tools do we use?
In the optical industry, a refractor is an optical instrument used to measure the strength of the eye lens, for example for the purpose of prescribing glasses. This determines the necessary correction: the spherical strength in diopters and the axis direction for any cylindrical correction for astigmatism (astigmatism is also known as cylindrical deviation) and any additional strength for the reading section (known as reading addition). Lenses with a reading section are multifocal.
There are basically three measurement methods: with a phoropter (hand-operated refractor), with trial frames, and with an autorefractor.
Foropter
A phoropter is a type of device used to perform eye tests. It is a type of optometry device used to measure visual acuity and assess the condition of the eye. A phoropter consists of a number of lenses that can be adjusted to test visual acuity. A hand-held refractor is used for subjective eye tests.
Autorefractor
An autorefractor is a type of automatic refraction device used to determine the strength of the eyes without requiring a subjective assessment by the patient. This is done by means of a computer-controlled analysis of the light reflected by the eye.
An autorefractor is considered an objective eye test, because the client has no influence on the result. The autorefractor is sometimes used for an initial exploratory measurement, to serve as a starting point for the measurement with the phoropter.
Factors that play a role
Various factors can cause the measurement results to differ:
- Different visual performance of your eyes throughout the day.
- Hormone and sugar levels in our blood determine our vision.
- Contact lens wearers should wear their glasses instead of contact lenses for 24 hours prior to the measurement. This can also have an impact.
Contact
You are in good hands at Van der Geest Optiek. Our senior optician (MBO Optometrist) has over 40 years of experience in the field.
Feel free to contact us to schedule an eye exam in Haarlem. The eye exam is always free* when you purchase frames, glasses, or contact lenses. Make an appointment via our contact page or call 0235254131.
