Hello dear,
Since you are using topical eye drops for management of 
eye infection, which have minimal systemic absorption, the hair fall cannot be considered as a side effect of the medications.
Causes of hair loss/thinning of hair are: 
1. Environmental factors 
2. Stress 
3. Deficiency of certain minerals, vitamins & amino acids in diet. e.g. Iron, zinc, Vit B complex, lysine. 
4. Hormonal factors. e.g. 
Thyroxine 5. Any incidence of surgery, shock, etc. 
Management includes: 
1. Treating the underlying cause 
2. Avoidance of stress 
3. Dietary modifications 
4. 
Minoxidil solution to be applied locally to stimulate the hair follicles 
5. 
Multivitamin & multi mineral supplementation
So, it will be better to 
consult a Dermatologist to find out the underlying cause & start treatment accordingly.
There is no need to worry.
Your hairs will grow back again. 
Wishing you a Good Health.
Take care.