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Using a Dome Security Mirror as Blind Corner Mirror

It's happened in most office spaces, kitchens, and warehouses.  People are in a hurry and they move quickly towards a hallway intersection.  Not paying attention, someone else is coming the other way and "BAM!" two people collide.  Most of the time, no one is hurt...but what happens when two forklifts approach the same intersection and can't see oncoming traffic?  That's a disaster.

This type of safety accident can happen, but they can easily be avoided using blind spot mirrors, corner mirrors, or more specifically, a quarter dome mirror.

The brief article below explains:

  • what are blind spot mirrors
  • why quarter dome mirrors are a solution
  • how to choose your quarter dome mirror
  • buying options

Why consider purchasing blind corner mirrors? 

If you are an employer who is concerned with safety, blind corner mirrors are an inexpensive yet highly effective method of decreasing work related accidents. Very few other methods of safety improvement rival the return on investment of blind corner mirrors, especially in warehouse environments where expensive forklifts and pay loads are shuffled around tight spaces non stop for hours every day.

As a brick and mortar store owner or manager, one of your daily concerns will be theft. Installing various mirrors in the blind spots of your store will discourage would be thieves from stealing merchandise or products from you, and allows for a safer store in general if it were to be victim of a robbery. These features alone more than justify the cost of a see around the corner mirror, but if that was not enough, some insurance companies will offer you benefits to installing them!

What are blind corner mirrors?

Coner blind spots are areas where you cannot see an intersection.  In the image above, picture yourself walking up the hallway towards the adjacent hallway.  Without this mirror, you really don't have a way to see what's coming other way.  Notice the mirror in the corner that allows you to see down the adject hallway.  

When we first think about a blind spot, we tend to think in terms of the example above where an accident may be avoided.   There are security reasons why you would want a mirror to "cover a blind spot as well."  Most convenience stores have an area where the clerk cannot see.  Depending on where the front desk is, a store clerk may not have clear line of site down an aisle or "around a corner."  Using a corner mirror allows the clerk to see an area , but more importantly, let's a potential thief know they can be seen by the clerk.

There are many reasons why a consumer or employer who is concerned with safety, security, or theft prevention would be interested in learning about and potentially purchasing a blind corner mirror, or see around the corner mirror.  So what type of mirror would you use?

Quarter Dome Mirrors Are Great for Blind Spots or Hard to See Corners

The quarter dome mirror are the ideal solution to cover blind spots, specifically in corner blind spots.  As the picture above shows, they are installed where the two hallway and a ceiling intersect.  These quater dome mirrors are also called 90 Degree Mirrors because they are the quarter of a 360 degree circle.

Quater dome mirrors are available with an acrylic lenses with three different backing types. The material used on the back of a :

  • No backing - for use indoors only.  There are are mounting brackets to easily attach the mirror to a surface but there is no backing needed to protect the mirror.  The image above is actually a corner mirror with no backing.  This is the most economical choice of mirror and will serve perfectly fine in most indoor situations.
  • Hardboard backing - the bacl of the mirror has a treated hardboard backing and is suitable for outdoor weather conditions.  A quater dome mirror with backing is treating with a special paint that makes the hardboard water resistant.  Although it is fine for most situations, we would not recommend this backing type where it will be directly hit by rain.  If you will have significant expsure to rain, we recommend a steel backing.
  • Galvanized steel backing - this is the backing type that's the most rugged and recommended for the most extreme environements.  The back is a galvanized steel that will protect the lens from any environment.

Although there are a variety of lens types, all of them have a rubber gasket that surrounds the rim to help protect it from most everyday use.  


What Size Corner Mirror Do I Need?

Deciding what size security mirror to choose is confusing at first.   Quarter dome mirrors are even more confusing.  The rule of thumb, and this is a rough estimate, is that for every inch of mirror, you can one foot of viewing distance.  If you are trying to see at least 20 feet, you need a 20 inch mirror, at a minimum.  But here's where things get more confusing, and here's an example below for a quater dome blind spot mirror.

A 32-inch corner mirror is created by cutting a 32 inch full dome mirror into a  1/4.  Although this is a 32'' quater dome mirror, the distance from the middle of the base to the tip would be half that distance.   For half dome security mirrors of the same size, the full dome mirror is cut in half.  When do that, you still have 32'' of distance from the middle of the base to center.  For a 1/4 security mirror, you are delivered roughly 16 inches, from base to tip, of mirror.


Common Places to See Corner Mirrors

  • Warehouses: forklifts often drive around quickly due to hourly work quotas, and will sometimes approach a blind corner too quickly. Installing a see around the corner mirror in these blind spots will not only improve your worker's ability to react to one another, but it will also prevent your machinery from getting damaged in a warehousing environment.
  • Office building and school campuses: blind corner mirrors also add an element of safety to office buildings and school campuses. In our era, school and office building shootings are becoming more common, so most institutions are vamping up their security measures. Between cameras and paid security officers, a lot of office buildings and campuses are quite safe places to be, but there still exists the need for increased visibility in case of a worst case scenario. Having blind corner mirrors allows the people on your property to react to any of these potential situations in a much safer manner.
  • Parking lots and garages: these mirrors can also be installed with road traffic in mind, as some hairpin turns with lots of foliage or trees can obstruct the driver's view. Adding large outdoor blind corner mirrors to these areas will allow road traffic to see another vehicle coming, even at night due to the reflection of headlights in the mirror, and slow down accordingly. Counties all over America have begun adopting blind corner mirrors to improve citizen safety on the road.
  • Retail store and shops: putting a mirror at a corner or down an ailes allows store clerks to see potential theft


Why are blind corner mirrors so important and what makes them such a good investment? 

A mirror that has the sole purpose of allowing people to see around corners has been in demand for quite some time. Utilizing angled or curved acrylic reflective material, these mirrors fulfill that demand. Blind corner mirrors are unique in that they allow two people or vehicles that are near each other, but not visible to one another, to react to the other person before any potential impact, crime, or other dangerous scenario occurs.




These mirrors allow you to eliminate blind spots in stores, create visibility where there would normally be none in a warehouse environment, and adds an extra security measure when it comes to monitoring people and items. Blind corner mirrors are a great investment, and require very little maintenance beyond the initial installation. It is recommended that mirrors are placed in positions that people cannot reach them, to increase the life of the mirror, although there are models that are nearly indestructible if you can not avoid them being in reach of people.