My eyes pupil are so big for two days, everything is ok

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dilated pupils for two days no other symptoms causes

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Dilated pupils lasting two days with no other symptoms can have several explanations, ranging from harmless to things worth getting checked. A few clarifying points would normally change the advice - are both pupils equally large, or is one bigger than the other? Do they still shrink when you shine a light on them? Any recent eye drops, new medication, alcohol/drug use, headache, blurred vision, or head injury? Since you say "everything is ok," I'll assume no pain, no trauma, and both eyes look similar - here's what that points to.

Most likely benign causes

Medications/substances - antihistamines, decongestants, motion-sickness pills, some antidepressants, and stimulant drugs (caffeine in high doses, amphetamines, cocaine, ecstasy) are anticholinergic or sympathomimetic and can keep pupils dilated for a day or more. Accidental exposure to dilating agents (scopolamine patches, certain plant alkaloids, some pesticides, or even residue from eye-drop bottles/contact lens solution touched then rubbed into the eye) can do the same - "Localization in Clinical Neurology, 8e," p. 300ish (Springing Pupil section).
Benign episodic (unilateral) mydriasis, aka "springing pupil" - a recognized, harmless phenomenon (more common in women, sometimes linked to migraine) where one pupil dilates for minutes to days with no other neurological findings, then resolves on its own - Adams and Victor's Principles of Neurology, 12th ed.
Adie (tonic) pupil - a benign, usually one-sided condition from mild damage to the nerve fibers controlling constriction. The pupil is large, reacts sluggishly to light but better to near focusing (light-near dissociation), and can persist for a long time. It's not dangerous itself but is diagnosed by an eye doctor - Goldman-Cecil Medicine, "Large Pupil."
Simple physiologic anisocoria - about 1 in 5 healthy people normally have a small, harmless size difference between their two pupils that can vary day to day.
Ordinary dim lighting or screen/dark-room time does not keep pupils dilated for two full days once you're back in normal light, so if that's the only exposure, it's less likely the explanation.

When this is NOT reassuring - seek care same day/ER

Only one pupil is affected and it doesn't react to light at all, especially with drooping eyelid, double vision, or difficulty moving the eye (raises concern for third cranial nerve compression, e.g., an aneurysm).
Any head injury preceded it.
Severe eye pain, redness, nausea/vomiting, and blurred vision (possible acute angle-closure glaucoma - an emergency).
New headache, confusion, weakness, or slurred speech (possible stroke or raised intracranial pressure).
It followed a seizure.

What to do next

Since it's been two days, the safest step is to have an eye doctor or your physician actually look at your pupils, check light reactivity, and compare both eyes rather than relying on self-assessment - many of the benign causes above are diagnosed by exam (pilocarpine drop testing for Adie pupil, slit-lamp exam for iris trauma, etc.). If you took any new drug, supplement, or were exposed to any drops/patches in the last few days, mention that specifically, since it's the most common reversible cause.

I did not find recent PubMed systematic reviews specific to this exact presentation since it's an established/stable topic in ophthalmology and neurology rather than an area with new evidence updates - the textbook information above reflects standard, unchanged clinical knowledge.

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