Turkelie,
MEA does not depend on any CAA for the class 1 medical which explains the harsh requirements at their pilot selections unfortunately.
EASA accepts astigmatism up to -2.00, FAA does not even have a limitation for astigmatism or any type of correction; you must just have 20/20 with or without correction.
MEA have their own rules and regulations. As for previous applicants, I currently know 2 first officers at MEA who wear glasses but I have no idea about their prescriptions.
Did you try to contact the pilot recruitment department or MEA's registered physician asking about your situation?
If you are able to come back to Lebanon for the duration of the selection, without losing your job/being away from family duties... I advise you to give it a shot and try. You can never know the answer if you don't go for it.
Good Luck and let us know what happens!