Glasses with lenses that help the wearer see things up close. Many people need reading lenses as they get older due to a common condition called presbyopia.

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Our 14-Day Fit & Style Guarantee allows an equal exchange or return within 14 days of purchase — no questions asked. And to make it even better, enjoy free shipping on orders over $119 (including designer brand)!

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An anti-reflective (also known as anti-glare) coating prevents reflections from appearing on both the inside and outside of your eyeglass or sunglass lenses. No reflections on your lenses means more light is reaching your eyes, which inevitably improves your vision.

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Cache is located on Arizona State Trust Land so you will need a ASTL recreational permit. These are available online at: https://land.az.gov/natural-resources/recreational-permits and can be printed at home.

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Progressive lenses are a type of bifocal lens that features a gradual change between near and distance vision correction. The premium version offers a wider field of vision.

Our 365-day product guarantee allows a one-time replacement pair of eyewear within 12 months, if any defects in the material or workmanship are found that prevent you from enjoying your frames to the fullest.

Our 365-Day Guarantee means you’re eligible for a one-time replacement pair within 12 months of purchase if there are clear defects in material and workmanship — so be good to your glasses!

The Corona Satellite Calibration Targets are two hundred and seventy two concrete markers in and around Casa Grande, Arizona  that helped to calibrate satellites of the Corona spy satellite program.

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Following the launch of Corona satellites in the 1960s, the National Reconnaissance Program determined that there was a need for calibration under the Controlled Range Network. Working with the Arizona Real Estate Office, the Army Map Service was directed to lease land for office space in Casa Grande, Arizona. Land was leased in one hundred by one hundred foot parcels, with access to a road. Large concrete Maltese crosses in the ground, sixty feet in width, and were in place by 1967. The crosses were arranged in a sixteen by sixteen grid, each roughly a mile apart from the next one.

Glasses with single vision correction lenses. They help with seeing either at a distance or near, depending on the wearer’s needs.

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Each of the targets has a manhole or hatch on the west arm of the cross, The manhole has a cement cover and steel reinforcement bars ("rebar"). According to a member of the Cold War Museum in Warrenton, Virginia, the 6 pieces of rebar, which protrude at an equal distance from each other, may have been used to hold laser lighting to give a more accurate fix on each target.

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Anti-reflective coating glasses lenses are practically invisible, so your eyes will look better and your stylish frames can take center stage.

We want you to be 100% happy with your eyewear. With 14-Day Free Returns, you can get a one-time replacement or refund within two weeks of receiving your order — no questions asked!

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All single vision EyeBuyDirect lenses come standard with an anti-reflective coating. High-index lenses naturally reflect more light, so this is an important addition if you’re interested in thinner lenses.

Blue light filtering lenses filter blue-violet light (blue-violet light is between 400-455nm, as stated by ISO TR 20772:2018​ and can accelerate aging of the retina) emitted mainly by the sun outdoors and indoors through windows, plus some artificial light sources like digital screens and fluorescent lights.

While caching I had seen a few of these targets but had no idea of their use.  Mystery now solved for me.  Thank you team RStarrT for enlighting me.

Glasses with Transitions® lenses automatically darken in sunny conditions and become clear when it’s darker. This allows them to work as both eyeglasses and sunglasses.

The majority of the targets were abandoned when the program ended in 1972. According to Army Map Service, the government considered the targets to be obsolete because the land on which they were situated had subsided because of groundwater extraction.  Land lessees were then given the option of having the targets removed and dumped near Eloy, Arizona. The remaining 84 targets (counted July 2016) have been left in place, unless they have been removed because the location has been redeveloped.