If you've ever been in for a comprehensive eye check, you may have noticed that the optician checked your eye pressure. But why do they do this, and why is it important for you to get such checks regularly?
Types of Eye Pressure Test
When an optician performs this test, they check the intraocular pressure of the fluid within the eye. They will typically use a tonometry test, which is the most reliable way of measuring internal pressure.
To perform the standard test, an optician gives you numbing drops so that you do not experience any discomfort and may also add a separate drop which contains a non-toxic dye. You will be asked to position your head on a special device that enables the optician to look at your eye through a magnifying device under a bright light.
Next, a separate device is gently touched to the cornea's surface, measuring the force required to indent the surface. This test will reveal the pressure level inside the eye.
Occasionally, an optician may use a "noncontact" test, which uses a puff of air instead. The device is placed close to the surface of the eye, and a quick pulse is emitted, which will gently flatten a tiny part of the cornea. Again, this will provide feedback to analyse the pressure levels inside.
How Fluid Protects the Eye
But why is there fluid inside the eye at all? Actually, this is known as the aqueous humour, which is responsible for lubricating the lens and supplying nutrients to the cornea. It also clears away any waste products that may accumulate, and some of the fluid will drain out naturally. Occasionally, this drainage system suffers a blockage, and this can cause a buildup of fluid and increase the eye pressure.
Avoiding Long-Term Damage
If the eye pressure remains too high, it can damage the optic nerve, which can have long-term repercussions. It can also lead to a condition known as glaucoma, which can progress to permanent vision loss if untreated. If you develop glaucoma, the sooner it's detected, the higher the chances of preventing any significant vision loss.
Making an Appointment
Now you can see the importance of scheduling an eye exam so the optician can check those pressures and avoid the buildup of any problems. If it's been some time since you last presented for an examination, make an appointment today for peace of mind.
Contact an optician for more information about eye exams.
