One of the 3 types of Eye Drop that I have to use, has to be kept in the fridge so i think I know first hand what you are refering to.
Occasionally I forget myself to return them to the fridge, particularly the final drops that I take before going to bed, only to find in the morning that I inadvertantly left them out overnight.
I wouldn't worry too much over this as here in the UK we generally have a much colder climate than those of the central tropical desert regions, so there is most probably nothing to over worry about.
The only real concerns is if the Eye drops in my case are allowed to exceed temperatures of 20 degrees C (Very unlikely here indoors in my kitchen in the UK) and then they jave to be above that temperature for a lenghty time period.
If you are worried there is usually a manufacturer's help contact details (usually via the Internet) on the information sheet that comes with the Eye drops that you could use, or alternatively ask your local Pharmatist.
Hope this re-assures. you.
Best of luck - Lazybones