Prostaglandin analogs may cause changes in iris color and eyelid skin, growth of eyelashes , stinging, blurred vision , eye redness, itching, and burning. Beta blockers' side effects include low blood pressure , reduced pulse rate , fatigue , shortness of breath, and in rare occasions, reduced libido and depression . Alpha agonists can cause burning or stinging, fatigue, headache , drowsiness , dry mouth and nose , and also they have a higher likelihood of allergic reaction. Carbonic anhydrase inhibitors may cause stinging, burning, and eye discomfort. 
The scientist first tested their theory on human lens cells. The studies showed that when lanosterol was applied to the cells, lens proteins stopped clumping and transparency increased. Next, they studied rabbits suffering from cataracts. After administering lanosterol for six days, 85% of the rabbits had a significant lessening of the severity of their cataracts. Cataracts in dogs were also investigated. Black Labrador Retrievers, Queensland Heelers and Miniature Pinschers, all dogs with significant naturally occurring cataracts, responded in similar fashion as the rabbits.
Steroid and antibiotic eye drops - hydrocortisone/neomycin/polymixin B; loteprednol/tobramycin; prednisolone/gentamycin; prednisolone/sulfacetamide; hydrocortisone /neomycin/bacitracin/ polymyxin B (Blephamide, Catapred [discontinued], Isopto, Pred-G, Poly-Pred [discontinued], Tobradex, Zylet and many other brands) are steroid and antibiotic eye drops prescribed to prevent or treat eye infections that are associated with inflammation. Side effects, drug interactions, dosage, and pregnancy safety information should be reviewed prior to using these medications.