What is normal vision after pupil dilation

Mydriasis is mainly divided into fast mydriasis and slow mydriasis. It mainly refers to the use of certain drugs to achieve the effect of short-term anesthesia of the ciliary muscle, which helps the accuracy of optometry. Generally speaking, through the use of such drugs, vision will gradually return to normal after a period of time. However, when using this method for eyesight testing, you should also understand some precautions. If the pupil is not dilated properly, it will have a certain impact on vision.

What is normal vision after pupil dilation?

1. Conclusion: After mydriasis, -1.00D (100 degrees) myopia is difficult to recover to normal vision (emmetropia).

2. Reason: In cases of visual fatigue and pseudomyopia, the ciliary muscles in the eyes are in a tense state and cannot relax. If an eye test is performed at this time, the result will often be higher than the actual myopia refractive power. By paralyzing the ciliary muscle through mydriasis, the accommodative power is temporarily lost, and the interference of visual fatigue and pseudomyopia on vision is basically eliminated. At this time, the measured refractive power is closest to the absolute value of the refractive power of the human eye, and there is basically no possibility of this value decreasing.

3. Analysis: The main purpose of mydriasis is to eliminate the interference of the ciliary muscle in the eye on vision examination, eliminate the factor of pseudomyopia in optometry, and provide assistance for retinoscopy. The -1.00D myopia diopter that remains after mydriasis is the actual myopia diopter, which has nothing to do with visual fatigue and pseudomyopia factors. All common myopia treatments on the market can actually only relieve accommodative spasmodic myopia caused by pseudomyopia and visual fatigue. Myopia is caused by changes in the curvature of the cornea, lens and other light-transmitting media of the eye or by lengthening of the eye axis, so it cannot be cured by relaxing the adjustment.

How long does it take for vision to return to normal after rapid pupil dilation?

Rapid mydriasis usually uses short-acting mydriatic agents, such as tropicam, which lasts for 6-8 hours, after which the eyes return to normal. Drugs that are sensitive and metabolize slowly may be less effective later. If you use a long-acting mydriatic, such as atropine, then recovery will be slower, usually taking about three weeks to fully recover. I hope my answer is helpful to you, and I wish you good health and happiness!