How many eyes with Suuntos?

[LukeM]

If your eyes seem to be struggling for dominance I believe that's called co-dominance. It's actually possible to train a certain eye to become dominant, or even switch eye dominance. There are all sorts of wonky eye issues people can have that I imagine could make 2-eye reading inaccurate.

Has anyone come up with a theoretical reason that one-eye reading would be inaccurate?

[caverdan]

So, an experiment is an ideal thing to do, to see which is better for any individual.

Sounds like the perfect thing for you to do at this years convention!!!

That would be fun. Though it wouldn't be a "you" thing, it would be an "us" thing.

I'll put you and Derek down as heading this idea up.......which one wants to be the chairperson of this experiment??

[Extremeophile]

I'll put you and Derek down as heading this idea up.......which one wants to be the chairperson of this experiment??

Not me. Since I already know the results before running the experiement I have a strong bias.

[Bob Thrun]

Has anyone come up with a theoretical reason that one-eye reading would be inaccurate?

"Put it this way: Why not a duck?"

[Crockett]

Mount an instrument on a tripod then move a target rod around to points with known distance, direction, and angle. Move the target after each shot until all the points are shot with one eye and two eyes.

The data might give some insights into the effect of distance and inclination for some readers. The elevation of the instrument is best fixed and that might lead to challenging positions for some very tall or very short readers.

I think this is an interesting waste of time. Use one eye.

[WVCaver2011]

If your eyes seem to be struggling for dominance I believe that's called co-dominance. It's actually possible to train a certain eye to become dominant, or even switch eye dominance. There are all sorts of wonky eye issues people can have that I imagine could make 2-eye reading inaccurate.

Has anyone come up with a theoretical reason that one-eye reading would be inaccurate?

Better yet, why would one eye not be accurate? One eye gives a straight on view of the station and therefore a straight reading. You would have accurate readings using this method because you wouldnt have any foreign angle to look from. If you are looking from the eye away from the suunto you are technically not on station and are actually off a few inches. Being on station means that you are also measuring from the station not from the right or left of the station like you would be if you were measuring with 2 eyes.

[NZcaver]

Better yet, use a DistoX and no eyes (except to keep the laser on target).

[Extremeophile]

Better yet, use a DistoX and no eyes (except to keep the laser on target).

With one hand or two?

[Kuzgun]

If you are surveying short distances, i think there should be no big mistakes between using Suunto with one and two eyes.

[NZcaver]

Better yet, use a DistoX and no eyes (except to keep the laser on target).

With one hand or two?

With my teeth.

[WVCaver2011]

If you are surveying short distances, i think there should be no big mistakes between using Suunto with one and two eyes.

You really have approximately the same error overall using 2 eyes for either short or long distances. With two eyes you will probably have a problem getting errors within 2-5 degrees from your backsight reading on close stations. The reason why you have approxomately the same error is because the distance your station focused eye is away from the suunto relatively remains constant and therefore your error depends on the distance your station focusing eye is away from station. The closer the the station the larger the angle would be with respect to your station focused eye and reading focused eye. The further the station the smaller the angle but the further the distance so therefore your error still remains relatively the same.

[WVCaver2011]

Better yet, use a DistoX and no eyes (except to keep the laser on target).

Yep, I fully agree!!! However, for those who werent lucky enough to purchase a DistoX before Beat Heeb stopped making them due to parts going obsolete, they still have to either use a Dusi or suuntos.... Fortunately I was able to find a Dusi but was unfortunately not in time for a DistoX purchase. This topic may not be for us that have either a Dusi or a DistoX but most of us at least have some experience with suuntos. Some of us more than others and some of us have learned from our mistakes and have had errors using 2 eyes which is why we changed to 1.

[WVCaver2011]

Next time your front or backsight readings are not within range ask yourself and your opposing reader rather they are using one or two eyes. If you or they are using two eyes, switch to one and see how much that helps out.

[Kuzgun]

DistoX has clinometer and compass ability? Why its solving the problem, a laser point and something you focused on a station are not the same things?

[Squirrel Girl]

Better yet, use a DistoX and no eyes (except to keep the laser on target).

Yep, I fully agree!!! However, for those who werent lucky enough to purchase a DistoX before Beat Heeb stopped making them due to parts going obsolete, they still have to either use a Dusi or suuntos....

Shetland Attack Pony, $440.