Some people, in an effort to save time or money, try to purchase eyeglasses online or without a professional eye examination. However, this is not inconvenient—it poses a risk to eye health. Contemporary research and expert advice highlight several serious issues.

📌 1. Incorrect Prescription May Lead to a deterioration in your well-being

If eyeglasses are prescribed incorrectly, the resulting image may be distorted, leading to:

✔️ headaches and eye strain;

✔️ chronic eye fatigue;

✔️ accommodative dysfunction (impaired ability of the eye to focus);

✔️ reduced visual clarity and discomfort during everyday activities.

A professional eye examination ensures accurate vision correction, including measurement of interpupillary distance and other parameters that cannot be reliably determined on your own.

📌 2. Undiagnosed conditions due to a lack of eye examinations

Preventative eye examinations are important not only for choosing eyeglasses:

✔️ many serious ocular diseases (e.g., glaucoma and diabetic retinopathy) are initially asymptomatic;

❗️ without an examination, a doctor may not detect them in time.

For example, experts note:

Missing a professional eye examination  may result in vision or signs of eye conditions are not detected in time.

📌 3. Errors in Self-Assessment Are Common

Research shows  that self-measured interpupillary distance (PD) often differs from accurate measurements by several millimeters, which can be sufficient to cause visual discomfort and impaired visual performance.

Data from the American Optometric Association also indicate that many individuals (38%) when determining their own prescription, are off by more than 0.75 D.  This means they may wear incorrectly prescribed eyeglasses which not only fail to improve vision but may also increase visual discomfort.

📌 4. An Eye Examination Is About More Than Eyeglasses

A professional eye examination includes:

✔️ measuring visual acuity;

✔️examination of the fundus;

✔️diagnosis of intraocular pressure;

✔️ detection of early signs of disease.

Missing such an examination can cost you your eye health, but it can also affect your overall quality of life.

📌 Conclusion

Buying eyeglasses without an eye examination is not simply a product purchase.

It carries the risk of:

✔️ an incorrect prescription;

✔️ increased visual strain;

✔️missing serious conditions;

✔️ long-term vision problems.

✅ The best approach is to consult a qualified ophthalmologist or optometrist for a comprehensive eye examination before purchasing eyeglasses.