I've been diagnosed with calcium deposits behind my eyes. What causes this and what is the treatment, if any?

It is likely you have optic nerve head drusen, which are calcified lesions that sit directly in front of the optic nerve, which enters in the back of the eye. Optic nerve head drusen often form spontaneously, but can also be inherited. No treatment is necessary, as they typically remain asymptomatic. Very rarely they may cause changes in the eye that can cause vision loss, however this is extremely uncommon.

I’m experiencing intense itching mostly on the lower inner lid of one eye. This has been going on for about a month. What could it be?

Itching is commonly associated with allergies; however, given that your complaint is only on one side this is unlikely unless you sleep with the affected side down on your pillow most of the time. Allergic itching can be effectively treated with over-the-counter antihistamine eye drops or pills. Tears often help dilute irritants and may also be effective. Another common cause of itching along the lid margin is blocked oil glands, or blepharitis. Regular eyelid hygiene with hot packs and baby shampoo can be effective for this type of problem.

My eyes hurt once I've taken out my contacts. Like something is in it, but nothing is. It hurts until I wake up in the morning. Is it something to worry about?

Contact lenses create a local environment under the lens which the eye surface becomes tolerant to. When you remove the lens, there is a more direct introduction of atmospheric conditions to the eye surface and it has to re-adapt. For most, this is a simple and quick adjustment but some will experience a certain degree of discomfort and a foreign body sensation can also occur. The fact that you have this for a prolonged period suggests a problem with tear flow or composition or perhaps the fit of the lens.

Is it bad for my seven-year-old daughter to wear clear, plastic, fashionable eyeglasses for fun without a prescription when she does not need them?

Children frequently respond to the attachment they make to their peers and that can include friends with visual needs for eyeglasses which some children interpret as "cool." If this is a strong need, there is no harm in supplying eyeglasses which have no optical correction in the front, and children in any case commonly wear sunglasses without problems.