Yes, it would be the underlying cause when you have increased or insufficient hormone levels. These chemicals regulate important body functions that can affect the eyes, and when they change, so can your eyesight. From childhood to old age, everyone experiences changes and fluctuations in their body chemistry. However, if you experience unusual or sudden vision changes, you should seek a comprehensive eye exam where your eye doctor can check your eyes and look for signs of other health conditions like diabetes. It's also a good idea to visit your medical doctor to find out if your hormones are out of balance.