Doctor insights on:
Astigmatism Night Vision
Yes: At night, the pupil dilates to let in more light. Astigmatism is a distortion in the cornea that causes different focal lengths for light passing through different parts of the cornea into the lens. With a small aperture (constricted pupil), the differences do not cause noticeable blurring. At night, when the aperture is larger, the eye has less depth of field, so the imprecise focus. ...Read more
Yes.: Astigmatism has to do with an individual seeing at night or day if the individual has astigmatism. The astigmatism must be corrected with the use of either spectacles or toric soft contact lenses or rigid gas permeable contacts in order to obtain one's best corrected vision. Astigmatism results when the eye, rather than being spherical, is more shaped like a football with two different curvatures. ...Read more
Astigmatism: Means that the front surface of the eye is not perfectly spherical. In other words, more like the side of an egg than an orange. Most eyes have astigmatism. If you have significant astigmatism, your vision will be blurred and you will need glasses or contact lenses to see well. ...Read more
Blur of vision: An astigmatic eye has optics that are some degree of ovalness. This produces a blur oval which lowers the acuity. Astigmatism is common, mostly lower orders of power, but sometimes very high. Correction is a reverse astigmatism built into the glasses or contacts. Your ophthalmologist can determine the degree of this in you and write out the proper correction. ...Read more
Astigmatism: It really depends on how much astigmatism you have. Some patients with low levels of astigmatism can see perfectly fine and don't require glasses or contact lenses to fix the refractive error. A detailed eye exam with an eye care provider is essential to check your vision and monitor for changes over time. ...Read more
If I want colored contacts. I have astigmatism, and the bc and dia is lower, will that effect my vision?
No: Base curve (bc) has to do with the steepness (or flatness) of the contact lens. Special soft contact lenses called toric contact lenses are required for clear vision in people with significant amounts of astigmatism. They are required to stay 'tighter' on the cornea and this can be accomplished by a steeper (lower) base curve and a smaller diameter (dia). Visial quality isn't affected. ...Read moreSee 1 more doctor answer
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