A cat's conjunctival sac holds 5 to 10 microlitres, and one commercial drop is 30 to 50. That single fact explains most of the technique: 1 drop is the whole dose, the second drop adds nothing but drainage down the tear duct, and anything more runs onto the fur.
Four numbers do the work. Head back 45 degrees. Aim at the lower lid pocket, never the cornea. Close the eye 30 seconds and press the inner corner 20 seconds. Space two different drops 5 minutes apart.
One drop, and why the second is wasted
Instil 1 drop and the sac is already full. A second drop at the same moment pushes the first out through the nasolacrimal duct into the nose, where it is swallowed and absorbed systemically instead of treating the eye. That matters for steroids and for timolol, where swallowed drug reaches the heart and airways.
Over a 10 day course at 3 doses a day, using 1 drop instead of 2 saves 30 drops and reduces the systemic exposure that causes the rare but real side effects.
Position: behind the cat, 45 degrees back
Work from behind and slightly to the side, not face to face. A cat that sees the bottle coming pulls the head down and tucks the chin, and a tucked chin is impossible to work around. Sit the cat on a table with its back against your chest, left hand flat under the jaw, and let the head rest against your sternum.
Tip the head back 45 degrees, no further. At 45 degrees the upper lid falls open and the drop lands in the sac; past 60 the cat panics and the eye rolls up. If a second person is available, that person holds the front paws, not the head.
| Step | Time | What you do | Common error |
|---|---|---|---|
| 1. Position | 5 s | Behind the cat, head back 45 degrees | Working face to face |
| 2. Open the pocket | 3 s | Pull the lower lid down 3-5 mm | Prying the upper lid open |
| 3. Instil | 2 s | 1 drop into the pocket, 5 mm from the eye | Aiming at the cornea |
| 4. Close and press | 30 s / 20 s | Eye shut, inner corner pressed | Rubbing the eye dry |
The drop goes in the pocket, not on the eye
Rest the heel of your hand on the cat's cheek so the bottle cannot jab if the head moves. Hold the bottle 5 mm above the eye, angled from the side, and pull the lower lid down 3 to 5 mm with the thumb of the same hand. The pocket that opens is where the drop goes; the cornea is a touch-sensitive surface that triggers a blink in about 0.1 seconds.
If the cat blinks and the drop lands on the lid margin, wait 10 seconds and try once more. Do not chase the eye around the socket, and do not put the bottle tip on the lashes, because that is how one infected eye becomes two and how the bottle itself gets contaminated.
30 seconds shut, 20 seconds pressed
Close the lids gently with 2 fingers and count to 30, which lets the drop spread over the cornea. Then press the inner corner, at the bony notch beside the nose, for 20 seconds. That closes the nasolacrimal duct and keeps the drug in the sac instead of sending it to the nose, where it drips into the throat and tastes bitter.
Skip the press and a steroid drop can reach the throat within 60 seconds, producing the swallow, the lip smack and the drool that owners report as a reaction to the drug. The press costs 20 seconds and removes most of it.
Two drops means 5 minutes apart
Two different eye medications go in 5 minutes apart, never at the same time, because the second washes the first out. Order matters: solution first, suspension second, ointment last. An ointment goes 10 minutes after the last drop, since it forms a barrier that blocks anything applied on top of it.
If the schedule is 4 times a day, that is 8 a.m., 12 p.m., 4 p.m. and 8 p.m., and with 2 drugs the whole routine takes 15 minutes, not 2. Write the times on the box; a 4 times daily course with 3 missed doses in 10 days is the most common reason a corneal ulcer stops improving.
Storage and the 30 day rule
Most multi-dose bottles are good for 28 to 30 days after opening, not until the printed expiry date, which applies to a sealed bottle. Write the opening date on the label with a marker, and discard at day 30 even if half is left. A preserved bottle that has been open for 6 weeks grows biofilm on the tip and puts it back in the eye.
Keep the bottle at room temperature unless the label says refrigerate. Cold drops sting and make the next dose harder. Never share a bottle between 2 cats, and never touch the tip to an eye, a finger or a tissue.
When to stop and call the vet
Phone within 24 hours if the eye is more squinty 48 hours into treatment, if the discharge turns yellow-green, if the pupil looks different from the other eye, or if the cat paws at the face. A corneal ulcer that is not healing after 5 days of drops needs a stain and a recheck, not a stronger bottle. Worsening pain in the first 24 hours is an emergency, and so is any bulging or bleeding, both covered in eye prolapse; discharge without pain is the slower picture in cat eye discharge.
Five steps for the first dose
- Wash hands 20 seconds, then write today's date on the bottle.
- Sit behind the cat, head back 45 degrees, hand heel on the cheek.
- Pull the lower lid down 3-5 mm and put 1 drop in the pocket.
- Close the eye 30 seconds, press the inner corner 20 seconds.
- Wait 5 minutes before the second drug, and note the 4 daily times on the box; the next recheck goes on the vaccine calendar if it lands on the same visit.
Frequently asked
Why does my cat drool after eye drops?
The drop drains through the nasolacrimal duct into the nose and throat within about 60 seconds, and the drug tastes bitter there. Pressing the inner corner for 20 seconds after instilling closes the duct and prevents most of it. Drooling within a minute of a dose is drainage, not an allergy.
Can I use the same bottle for both eyes?
Yes for one cat, as long as the tip never touches an eye, a lash or a finger, and you use a fresh tissue if you need to blot. Never share one bottle between 2 cats, because the tip carries whatever was on the last eye and a single infected eye becomes a household problem.
How long are opened eye drops safe?
28 to 30 days from opening for most preserved multi-dose bottles, regardless of the expiry date printed on the box, which covers the sealed product. Write the opening date on the label, keep the bottle at room temperature unless told otherwise, and discard at day 30 even if half remains.