3 year old stung by wasp on eye brow

My son was just stung by a wasp on his eyebrow and it has caused his eye to swell shut.  The ice didn't really help the swelling but he is not complaining of anything besides it being sore.  When should the swelling subside and is there anything in a wasp venom that could affect his vision?  What should we look for as the night/a.m. progresses?  thank you!

[Dr_Aparna]

test123

[Dr_Aparna]

Hi,
Most bee and wasp stings are not serious. A minor sting can be painful and sometimes cause a little swelling, redness, burning, or itching at the site of the sting.
Hornets, wasps, yellow jackets, and ants do not leave their stingers, but bees can. If any part of the stinger remains, scrape it out immediately with your fingernail or the edge of a credit card. Do not push on the stinger, or you may squeeze more poison into the wound. Wash the affected area with soap and water, then apply ice or a cold pack to reduce pain and swelling.
Apply a 1 percent hydrocortisone ointment, which is available over the counter, if the itching is significant. An antihistamine such as diphenhydramine (Benadryl), also available over the counter, may also help.
Remember to seek immediate medical attention if the sting gets infected or if the swelling doesn't subside or progresses.
ref:http://www.myonlinewellness.com/topic/bites
Nothing in the venom will directly affect vision.Make sure the stinger is out for the reaction to subside.