What Are the Vertical Indicators on My Contacts Lenses For?

The invention of the toric contact lens has made contacts available even for patients with astigmatism. These lenses come equipped with a vertical indicator for a few different reasons.

Problems with Contacts and Astigmatism

• Historically, individuals with astigmatism found it difficult, if not impossible, to wear contact lenses. This problem existed because the rotation of the contact in the eye would cause blurred vision every time the patient blinked.

Importance to the Optometrist

• The vertical indicator is the most important to the optometrist who determines whether or not the contact fits the eye. This is important because a poor fit allows the contact to rotate within the eye, causing blurred vision.

Role in the Eye Exam

• During an eye exam, the optometrist uses a scope to project a slit of light onto the eye. The vertical indicator allows the doctor to see that the contact is properly aligned.

Importance to the Wearer

• These indicators can also be helpful to contact wearers. By positioning the vertical indicator at the top of the contact before insertion, the patient can avoid the temporary blurred vision that is typical when toric lenses are first put in.

Limited Necessity

• While the vertical indicator may help some contact wearers, it is not necessary to rely on them for proper contact use. The lens will rotate into the correct position after a minute or two.