By ordering glasses online, you can keep more money in your pocket, but generally speaking, you will get more personalized service at the glasses store.

After weighing these pros and cons, some glasses wearers adopt a mixed purchase in order to have the best of both worlds.

Personal finance blogger Becky Beach said: "In order to buy the right cheap glasses, my way is to go to the physical store to try them on.

She will photograph the style number of the selected glasses frame and search for websites that sell the same style of glasses.

"The price of glasses in brick-and-mortar stores is too high, and it's much cheaper for me to buy them online," she said.

Are you considering whether you should try to save the cost of glasses, or choose the personalized service and usually higher price of the ophthalmologist's clinic?

Let's look at the pros of buying cheap glasses:

The benefits of buying discount eyeglasses online

Buying glasses online can save you money, time, and visits to an ophthalmologist or vision center. Here are four reasons to consider buying cheap glasses online:

1. Cheap glasses cost less.
According to VSP, the largest eyesight insurance provider in the United States, a pair of standard glasses can cost more than $400, if added with something extra, such as shatter-proof lenses with an anti-reflective coating.

You can usually buy cheap glasses at less than 25% of this price online.

2. Overlay savings with special offers.
You can save more money by using online glasses coupon codes and discount activities.

Many online retailers offer seasonal promotions that can save you 20% or more on glasses.

Opticians and eyesight centers that sell glasses also offer regular promotions. For example, LensCrafters holds a half-price promotion on frames at certain times of the year.

Some ophthalmologists also offer discounts for eye examinations and the purchase of glasses or contact lenses.

Tip: email the registered ophthalmologist and check the ophthalmologist's Facebook page or Twitter feed.

3. Order cheap glasses easily and quickly.
No matter during the day or night, you can order cheap glasses on the sofa for no more than 30 minutes.

This is much more convenient than squeezing time to go to the optician during business hours.

You usually need to go to the optician twice a day to pick up the frame and place an order, and the second to pick up the glasses.

When you buy glasses through your smartphone or computer, your new designer Cat's Eye will be delivered to your door.

4. It is easy to compare buying glasses.
When buying glasses online, you can quickly browse multiple websites and decide what to buy and where to buy them.

How to find the best place to buy cheap glasses online?

View the reputation, customer reviews, frame selection, price, lens options, and return policies of online retailers. Oh, don't forget to pay attention to whether there is a price-matching guarantee.

When buying glasses at a physical optician, it can take hours to compare prices, and you may run back and forth from one optician to another, running out of gas in the tank.