We perform many different types of eye examinations. Some examinations involve dilating the pupils. Artificial pupil dilation will impair your visual acuity, so you should not drive immediately after such an examination.
Below, you will find more detailed information about the different types of eye examinations as well as instructions on how to prepare for your examination.
- optical coherence tomography (OCT)
- eye photography
- fluorescent angiography
- visual field tests
- eye pressure measurements/monitoring
- colour vision tests
- cornea thickness tests
- corneal topography
EYE IMAGING TESTS
Optical coherence tomography (OCT) is a cross-sectional scanning technique used to detect abnormalities in the retina or in the optic nerve and nerve fibres. The examinations involve widening the pupils with dilating eye drops. Artificial pupil dilation will impair your visual acuity, so you should not drive for a few hours after the examination. The examination takes between half an hour and an hour.
The surface of the eye and the retina are photographed in order to detect abnormalities in the eye. Eye surface photography does not require dilation of the pupils. However, when the retina is to be photographed (papilla, nerve fibre, macula or diabetes imaging), the pupils are dilated with eye drops. Artificial pupil dilation will impair your visual acuity, so you should not drive for a few hours after the examination. The examination takes around an hour.
Fluorescent angiography (FAG) is a technique used to detect vascular or other abnormalities in the fundus (i.e. the back of the eye). The examination requires that the pupils are widened with strong dilating eye drops. A special dye is injected into the arm and travels with the bloodstream to the blood vessels in the fundus. During this process, a series of photographs are taken.
The pupil dilation makes the eyes sensitive to light, and visual acuity will be impaired for several hours. You should therefore be careful on the way home. Do not drive. We recommend that you bring a pair of sunglasses with you. The dye leaves the body with the urine. It may turn the urine darker for around 24-36 hours and the skin slightly yellow for 6-12 hours.
You can eat and take medications normally before the procedure, but you should not use pupil constricting eye drops (such as Pilocarpin, Timpilo or Fotil).
After the examination, your general condition and any allergic reactions are monitored for around half an hour. The preparations, the examination itself and the follow-up monitoring take around two hours in total.
Visual field tests are used to measure the extent of, and identify any defects in, your visual field. Loss of visual field can be caused by diseases in the eye or optic nerve or by a brain function disorder. Visual field tests can be used to diagnose glaucoma (an eye pressure disorder that causes permanent damage to the optic nerve) even before the vision changes become significant enough for the patient him- or herself to notice.
You can drive yourself to the examination. We recommend that you bring your most recent glasses prescriptions with you. The examination takes around an hour.
Octopus 101 perimeter
The method is used to measure visual field threshold values. The most common measurement strategies are G2 and TOP. The examination involves showing the patient different sized lights. One eye is examined at a time. The most common reason for undergoing the test is glaucoma.
Goldmann visual field test
Goldmann visual field tests are used to examine patients with eye pressure disorders, but also neurological patients. The test can, for instance, be used to investigate visual field defects caused by stroke. The examination involves showing the patient different sized moving lights. One eye is examined at a time.
Eye pressure is measure with an applanation tonometer or, if necessary, with an Icare tonometer. Applanation tonometry requires the use of eye drops which anaesthetise the eyes and give them a yellow colour. The drops do not affect your vision, but they can cause a burning sensation and the eyes may feel sticky and numb for around 30 minutes after the examination.
Single eye pressure measurement
A single eye pressure measurement is usually performed with an applanation tonometer.
Long-time eye pressure monitoring
The aim of this examination is to find out how the eye pressure varies over the day. The eye pressure is measured (with an applanation tonometer) three times during the day, at intervals of a few hours (around 8am, 11.45am and 3pm). If you regularly use eye drops, you can use these as normal. You can drive yourself to the examination.
Panel 15 colour vision test
This test uses colour caps to test colour vision. The test only takes around half an hour. You can drive yourself to the examination.
Panel 100 colour vision test
This is a more extensive colour vision test. The test takes around two hours. You can drive yourself to the examination.
Cornea thickness measurement is also known as pachymetry. The thickness of the cornea can be measured using light, an OCT camera or ultrasound. We use a Pachmate measuring device. The measurement is used as a tool for assessing the risk for glaucoma. The use of the Pachmate requires numbing drops to anaesthetise the eye.
Tophography is used to determine the shape of the cornea. Topography is part of the preoperative assessment used to determine the suitability of refractive surgery, and is also used to diagnose diseases such as keratoconus (thinning and bulging of the cornea). The examination is painless.
You need a doctor’s referral to undergo these eye examinations. When you have a referral, you can make an appointment with our eye care unit by calling 09 7750 8160.
The examinations are performed in the ways described above. Please read the descriptions carefully, as some examinations involve dilating the pupils. Artificial pupil dilation will impair your visual acuity, so you should not drive immediately after such an examination. If you have been referred for a visual field test, please bring your most recent glasses prescription to the test.
Most test results will be available electronically immediately. If necessary, we will send the results to your regular physician.
Porkkalankatu 22 A
|Monday - Thursday||7.30-20|
MD, Specialist in Ophthalmology, Eye Surgeon. Cataract surgery, laser treatments for posterior capsular opacification (PCO), Femtolasik laser eye surgery, corneal surgery, Intacs procedure, keratoconus
MD, Specialist in Ophthalmology and Neuro-ophthalmology, Eye Surgeon. Cataract surgery, YAG laser treatments for posterior capsular opacification (PCO), laser treatments for glaucoma, selective laser trabeculoplasty (SLT), LASIK laser eye surgery, PRK laser eye surgery, neuro-ophthalmology (diagnosis), eye diseases (diagnosis and treatment)