I'm an airline pilot last friday night we were descending on the profile descent into san diego i am the captain both me and the first officer observe to emerald light appeared have 5 sides in a forest down by the mexican border this emerald colored light was extremely bright was not a laser being being focused at the airplane as my first officer has fallen in the middle east with the air force in it than laser many times but this huge light look bigger than a house was seen about 20 miles away it it was like a super neon he's seen it for about three minutes as we are very busy and the descent both of us and never seen anything like this before both of us encountered sore eyes the next day and this is five days later i still have a little bit of pain in my eyes but this was not a laser being focused at the airplane this was a huge brilliant light like neither of us have ever seen both of us agreed we didn't know what it was or what could put out that much energy to her dies from 20 miles away and both of us agreed that it was not a laser pointed at us but this forest preserve look like it was very large size and this thing was out in the south corner of it i would like to get a picture but we're very busy at the time on the descent i've been flying for the airline for 32 years and i've never experienced anything like this and i can't tell you if this is man-made or this is something else but the power from the same must have been incredible to cause damage to our eyes like that my visions good the same as before just like i've looked at a welder thank you very much