Yes, it is true that your vision will be affected by thyroid. You could also get eye bags due to thyroid which can only show the eyelid late fall. What's worse, you could even get retreat rabbit eye and eyelid pure exophthalmos or exophthalmos with different degree of hyperthyroidism by controlling the hyperthyroidism in the early stage. There are many side effects from thyroid on eyes, including the continuous eyelid, eyelid shrinking, late fall exophthalmus and some soft tissue. Your vision may be affected too. In order to prevent it, you could just eat more food with vitamin C to moisture your eyes. You could also use some eye drops to moisture the eyes and get rid of the invisible bacterium. You should take the medical care to treat your thyroid. About the eyes, you need to protect it from the daily healthy diet and good rest.
Well, of course, thyroid can just be bad for your eyes. As we know that thyroid disease is a thyroid hormone deficiency disease. And in many cases, it can lead to a lot of eye problems. For example, it can just cause sensitivity to light in your eyes, which will just affect your vision. Also, dark circles under your eyes can be possible too. By the way, because this kind of disease can cause an infiltration of complex sugar molecules in your face, it will just cause swelling and discoloration in your face and around your eyes. For your situation, I will suggest you eat more fruits and vegetables and it can be effective. Of course, Seeing Eye doctor can be essential too.
It is true that overactive thyroid or hyperthyroidism can affect vision. The hyperthyroid is usually caused by Grave's disease. Stare, eye irritation, bulging of the eyes, double vision and loss of vision can be the symptom of hyperthyroidism on eyes. In some cases, patients suffer from acute angle glaucoma caused by hypothyroidism. Hyperthyroidism has other effects on body, such as jitteriness, shaking, increased nervousness, irritability, palpitation, hot feeling, loss in weight and high frequency of bowel movement. Dryness and scratchy sensation in eyes can also bother the patients. Fortunately, this problem is easy to get rid of by applying topical lubrication. However, the link between thyroid disease and vision problem should be defined by doctors.