Since round tortoiseshell glasses first came on the market, they've come full circle. When round-rimmed glasses were brought back into the spotlight by figures such as John Lennon, they transcended their humble beginnings. Although some might say they never really went out of style, they certainly had a chance to shine once they became part of the summer of love culture. It was during this period, until the 1970s, that the infamous oversized round sunglasses also became mainstream with their brightly colored lenses. 
While round tortoiseshell glasses are generally flattering, some face shapes look better with these frames than others.
For example, those with naturally round faces may opt for square frames or cat-eye frames to better balance their appearance.
Round tortoiseshell glasses can be worn on a round face and work well, but you may need to spend more time thinking about the size of the frame than someone with a less curvy facial structure.
In general, round tortoiseshell glasses on an oval face work better than some other round faces because the round frame balances out the longer length on an oval face.
You'll find that a balanced ratio of round frame shapes benefits the most for round prescription glasses with facial shapes with sharper angles and less natural balance between facial length and width. If you're not sure about your face shape, you can use our interactive guide.
Well, now you have to decide on the right color and material, which sounds a lot easier than it is. If you've ever bought glasses before, you're probably familiar with how overwhelming these options can be. Fortunately, picking out frames online makes it easy to narrow down your selection of filters to your liking.
If you're not sure, these tips might help point you in the right direction!
Round metal frames are a great choice for people with both warm and cool colors, as you can find frames in both warm and cool colors.
If you like the look of metallic round tortoiseshell glasses, silver frames will look especially good if your skin has a cool undertone. Conversely, if your skin has a warm undertone, gold metal can make it easy for you to upgrade.
If you're looking for a trendy color, the same principle applies. Warm and warm mix best, cool and cool mix best. If you want to add more glamour to your frames, you can also find patterned round prescription glasses that provide a distinctly modern touch to this timeless style.
Of course, classic black frames are always a good choice for both warm and cool skin tones. You can find black round-rimmed glasses in any material, such as coated metal and acrylic.
Do you like to keep it simple? If that's the case, you might want to check out a pair of round rimless glasses. The frameless look works very well with round lenses, eliminating the hassle of choosing a color while still looking stylish.
If you want a little color, semi-rimmed round tortoiseshell glasses are another good option.
If the last century is any indication, the trend for circular prescription glasses is here to stay. Round frame styles are timeless and you really can't go wrong - so pick up a pair of round tortoiseshell glasses with confidence, knowing they'll make you look great for years to come.