Golf Rule Question

Hello all,
i have a quick question regarding the use of a binocular/monocular when playing golf.

Most golf courses i played use different color flags to determine where the flag is positioned on the green.

Here lies the problem for me as im color blind and ive poor eyesight.

yes i wear glasses to help counter the poor eyesight. But i have no way to 'level the playing field' in regards flag positioning. Sometimes i've been unable to see the flagstick/flag due to the green background due to colorblindness.

Would it be legal for me to use a monocular to see the flag position??
i know some greens are hidden and it would be useless, but a high percentage i could use it.

I didnt wanna buy it without asking the legal ruling on it.

Any help would be appreciated.
Sean