EXPERIENCE MFV^TM

As described on page “The MFV^TM Lens”, the MFV^TM vision improvement is the aggregate of two effects:

MFV-1: eye sensitivity increase (forced by filters reducing light together)
MFV-2: scene brightness control (done by filters independently with their density).

Effect MFV-1 also happens in common sunglasses, but it is not noticeable and it has never been exploited. Briter Vision^TM uses it for its sunglasses designs.

It is easy to experience MFV-1 by making a simple face mask, like the one described here.

Making a face mask to experience NFV-1:

Get a standard 8×11 not-too-thin and dark paper sheet,
Place some glasses on the paper and bend the sheet sides to include the glasses.
Place some glasses on the paper and bend the sheet sides to include the glasses.

With a pencil make two SMALL holes so that both eyes can see through.
Enlarge SLOWLY the sizes of the holes to increase your through-view
Stop when you can see an entire chair (and no much more from about 6 feet.

Don’t worry if the holes are not perfect ovals. The most important factors are:

– for each eye to have about the same view,
– the view should not be too large, just enough to see a chair from about 6 feet.

Experience Effect MFV-1

Once finished the mask:

Outdoor on a sunny day, choose a location where you feel you’d need sunglasses;
Look around, especially in the shade. Find objects that are visible but not too clear. Prints of “contrast sensitivity charts” (found on the internet) can make the test more reliable. Also place some reading material at a distance where you can almost read it.
Finally compare your vision acuity in the three ways: naked eyes, common sunglasses and face mask.

If you have built your mask well enough, you’ll see what many have already seen: the targets get brighter and easier to see, the charts easier to read, Remember: you are just experiencing a well-known and natural function of the human vision system (eye adaptation). Well known but not exploited in common sunglasses.

MFV-1 in a Digital Camera

These photos were taken with a Digital Camera, that has an auto-exposure function with the same goal as the human vision system: to produce images that are neither too bright nor too dark. In mathematical terms the average of all the image points (or pixels) RGB values must be in the middle of their range. This algorithm is a decent approximation of the human eye-adaptation function. But, in a case like this, where half of the scene is really bright and half really dark, neither half will get the right exposure. As a matter of fact the calculated exposure, mathematically correct for the all image, is too long for the right side (or over-exposed = too bright) and too short for the left (or under-exposed = too dark).

Photos 2 and 3 show what happens as we block (in two steps) the view of the window (the light source) from the camera:

the luminosity of the scene (as seen by the camera) decreases, and, as a consequence,
the exposure increases to keep the total brightness of the resulting image about the same. And this benefits the left side which gets brighter and brighter,

This is another example of the MFV-1 effect used in MFV^TM eye wear and not noticeable with common sunglasses.

This is an extreme example of how the MFV-1 effect is used in MFV eyewear. Generally the periphery of the lens is darker relative to the its center, resulting in brightening the center. This case is >***>> defined as MFV-100-0 as the LTC’s are 100% and 0%.

EXPERIENCE MFV TM

Making a face mask to experience NFV-1:

Experience Effect MFV-1

MFV-1 in a Digital Camera

EXPERIENCE MFV^TM