Amplyopia, known as lazy eye­, can happen because childhood vision didn't de­velop right. Or it can be caused by othe­r eye issues. Signs may be­ blurry sight, or eyes not working togethe­r well. At 54, treating lazy eye­ is harder, but vision therapy or glasses might he­lp improve eyesight some­. Getting eyes che­cked regularly is very important.

Your eyesight has changed a bit with a measurement of -0.25D. This might make your vision less clear and give you sore eyes or a headache. If you spend lots of time looking at screens (like phones), these symptoms could get worse than they already are. To protect your sight, attempt to keep screen use down to 2 hours everyday maximum and take breaks every 20 minutes or so where you focus on something in the distance. You should still wear your glasses as directed by the optician as well. 

Eye pain and swelling could signify a serious PROBLEM.. SEEK medical ATTENTION now.. Possible causes: INJURY, INFECTION, allergies or other MEDICAL conditions.. if you are working then it could be because of continious seeing the screen. Symptoms may get worse without TREATMENT..

The retina is a thin film of tissue making the inner surface of your eye that transmits the images outside to your brain. Problems with the retina can lead to serious vision issues. Signs of the problem with the retina you might get are blurred vision, flashes of light that come out of nowhere, and the perception of something that is not there in your field of vision. Causes can range from aging to serious conditions like diabetes. In the case of treatment, the restoration of vision is usually done by a surgical operation on the damaged retina. 

Noting that using the flashlight of your iPhone near your eyes is not a desirable situation, it is highly unlikely to be the cause of any significant damage to your vision. Being exposed to bright light can bring about temporary discomfort or glare; however, it is usually not the cause of long-term damage. Also, the visual impairments that you noticed lately can be brought by other reasons like eye distress and stress. At the same time, remember that your eyes should not be looked at very closely without a break. I think you should go and see an eye specialist to get your vision checked and also to talk about the symptoms You feel.

It might be a good idea to seek medical attention since you're experiencing low fever, sore throat, etc.. Given your history of migraines, these symptoms could have various causes. If your symptoms are severe, worsening, or causing significant distress, it's advisable to seek medical help promptly.