Below FAQ are some common concerns of our clients before purchasing our products, if you have other questions, please just send it to help@kaioptics.com
Measurements are provided on the product page for all of our frames. Please compare the measurement of your current glasses to the measurement on our site to get the right fit for you. Frame measurements are listed as three numbers on the inside of the temple arm as shown below: 49 = 49mm
We currently offer single-vision lenses for prescription eyeglasses only. We can fill prescriptions with sphere value between -9.00 and +6.00. High-index lenses are recommended if your prescription is stronger than 9.00. We do not offer progressive or sunglasses prescription at this time. Keep in touch with us here and be the first to know about new products and exclusive deals.
We offer 2 types of lenses: polycarbonate and high-index lenses. Please see details below:

Polycarbonate lenses
  • Lighter, thinner, and unbreakable
  • Resilient and impact-resistant
  • Built-in UV filters
  • Anti-scratch and anti-reflective
High-Index lenses
  • Thinner lenses designed for strong prescriptions
  • 1.67 is recommended for sphere from 6.00 to 9.00
  • 1.74 is recommended for sphere 9.00 and up
  • Anti-scratch and anti-reflective
Browse through our men's and women's glasses and pick out the frame style and color that you want to order. Check to make sure the frame width is the right fit for your head width. Type in or upload your current glasses prescription and we will do the rest.
Please visit our shipping and returns page for estimated delivery times.
Please contact us as soon as possible and we will do our best to amend and/or cancel the order.
We will email and/or text you status notifications including your tracking number. Please contact us at help@kaioptics.com if you have any questions.
We ship within the US and Internationally. However, our try on program is only available for US customers at this time. Please visit our shipping and returns page for more information.
If you are not completely satisfied with your purchase, you can return it within 30 days of receiving your order. Please visit our shipping and returns page for more information.
We accept both HSA and FSA as forms of payment for any prescription eyewear. You can also request for reimbursement from your insurance company with a detailed copy of your invoice. Please email us at help@kaioptics.com for a detailed invoice.