Silmätiedot

Silmätiedot, or eye measurements, are a set of precise measurements taken from the human eye to determine the correct fit of eyeglasses, contact lenses, or other vision correction devices. These measurements are crucial for ensuring optimal visual comfort and clarity. The primary silmätiedot include:

1. Pupillary Distance (PD): The distance between the centers of the pupils, which is essential for aligning the lenses correctly in eyeglasses or contact lenses.

2. Segment Height: The distance from the top of the eye to the bottom of the lens, measured at the center of the pupil.

3. Eye Width: The horizontal distance across the eye, measured at the level of the pupil.

4. Lens Height: The vertical distance from the top of the lens to the bottom of the lens, measured at the center of the pupil.

5. Bridge Size: The distance between the two sides of the nose where the eyeglasses rest.

6. Temple Length: The distance from the center of the pupil to the end of the temple arm of the eyeglasses.

These measurements are typically taken by an optometrist or optician using specialized tools and techniques. Accurate silmätiedot are vital for creating custom-fitted vision correction devices that provide the best possible visual experience and prevent discomfort or vision issues. Regular updates to silmätiedot may be necessary as the eye's shape and size can change over time, especially with age or due to changes in facial structure.