Allergys can cause itchy eyes.
Subatomic particle
A colloid is not a subatomic particle.
A quark is the smallest particle in matter.
The proton is a positively charged subatomic particle
This particle is the electron.
I have a dust particle lodged in my left eye.
A 20 micron particle is not visible with the naked eye. The smallest particle visible to the naked eye is 40 microns. To give you some perspective, a piece of hair's width can range from 40 to 120 microns.
100 um
I should say so! I would go to a eye doctor if I were u. Unless you've had it sense you were born.
A photon is an elementary particle, the quantum of light and all other forms of electromagnetic radiation, and the force carrier for the electromagnetic force, even when static via virtual photons. The photon is not on the eye.
Try blinking several times to see if the object dislodges on its own. If that doesn't work, rinse your eye with clean water or saline solution. Avoid rubbing your eye, as this can cause further irritation. If the discomfort persists, seek medical attention.
Light is a particle called a foton that is fired of by a star and then continue's to travel in the direction it was fired in for many ages until it reaches something it collides with. it can be that this particle reaches earth or your eye in witch case you see it
100 Micron100 Micron's = 0.1 millimeter, about the width of a human hair.
Macroscopic things which could be seen by naked eye and under visible wavelength of light are considered opposite to Elementary particles !
The cornea
Yes. Go to an ophthalmologist.
They pass from particle to particle by vibrating the particle. When the particle touches another particle, it transfers the sound energy to that particle. Hence the Sound Wave.