Sunglasses are no longer just a summertime must-have. According to my eye doctor, we need to wear them year-round to protect our eyes from the sun's harmful UV rays. But nothing feels more wasteful than spending a small fortune on a pair of shades only to lose them, sit on them, or just drop them (the gravitational pull of the dirty ground and my Norma Kamali sunnies is remarkable).

Rather than splurge, why not think of sunglasses as an affordable, fun accessory that you could change as often as you switch out your shoes? I've seen women who keep their collections in a drugstore-like carousel by their front door so they can spin and choose as they walk out in the morning. We've rounded up 10 pairs of sunglasses for under $50 -- think of them as an inexpensive investment in the health of your eyes.

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  • Topshop "Catmaster" Sunglasses, $32

    <a href="http://us.topshop.com/webapp/wcs/stores/servlet/ProductDisplay?catalogId=33060&storeId=13052&productId=5842593&langId=-1&sort_field=Relevance&categoryId=208713&parent_categoryId=208582&pageSize=20&siteID=J84DHJLQkR4-qJnoThrCGUhZBf0Of8Rl8g&cmpid=aff_ls_tsus&_$ja=tsid:21416|prd:J84DHJLQkR4" target="_hplink">Topshop</a>

  • Aldo "Kohara" Sunglasses, $12

    <a href="http://www.aldoshoes.com/us/accessories/womens/sunglasses/88788030-kohara/70" target="_hplink">Aldo</a>

  • Cheap Monday "Lux" Sunglasses, $30

    <a href="http://www.revolveclothing.com/DisplayProduct.jsp?product=CHEA-WG6&c=&d=a&currency=USD&utm_source=shopstyle-en_US&source=shopstyle-en_US&utm_medium=affiliate" target="_hplink">Revolve</a>

  • Old Navy Foldable Sunglasses, $8

    <a href="http://oldnavy.gap.com/browse/product.do?pid=118477032&tid=onsp1r&kwid=1&ap=14" target="_hplink">Old Navy </a>

  • Arden B. New Cat Eye Sunglasses, $20

    <a href="http://www.ardenb.com/catalog/product.jsp?categoryId=138&subCategoryId=441&productId=56884&utm_source=gan&utm_medium=affiliate&utm_campaign=k108283#ClosePopup" target="_hplink">Arden B. </a>

  • Joe Fresh Aviators, $20

    <a href="http://www.joefresh.com/en/product/aviators" target="_hplink">Joe Fresh</a>

  • Fred Flare Leopard Trim "Ramona" Sunglasses, $14

    <a href="http://www.fredflare.com/WHAT-S-NEW/Leopard-Trim-Ramona-Sunglasses/" target="_hplink">Fred Flare</a>

  • Peekabooda Vintage Sunglasses, $48

    <a href="http://shopplanetblue.com/vintage-sunglasses-peekabooda-39337" target="_hplink">Planet Blue</a>

  • American Apparel "Blair" Sunglasses, $35

    <a href="http://store.americanapparel.net/blairsg.html" target="_hplink">American Apparel </a>

  • Free People "Marlo" Round Sunglasses, $24

    <a href="http://www.freepeople.com/whats-new-accessories/marlo-round-sunglasses/?cm_mmc=GAN-_-Affiliates-_-ShopStyle.com-_-Shop at FreePeople.com!" target="_hplink">Free People </a>

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