Pupil Dilation: Concerns About Eye Examination Sounds and Safety - Ophthalmology

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Inquiry about eye problems?


Hello, doctor.
I went to see a doctor because my eyes were uncomfortable, and the doctor said I needed to undergo dilation.
I have had dilation exams before, where the doctor would first instill dilating drops and then use a device similar to a magnifying glass to examine my eyes.
However, today after the doctor instilled the dilating drops, he used a similar magnifying device and placed it directly on my eyeball to examine it.
He mentioned that it had a high concentration of artificial tears on it.
When the doctor removed the magnifying device, I heard a popping sound and wanted to ask if that sound was due to my eye being suctioned.
Will this affect my cornea? Could it harm my vision?

Dàxuéshēng, 20~29 year old female. Ask Date: 2020/04/21

Dr. Gao Pilin reply Ophthalmology


Hello, university student: The three-mirror lens used for examining the peripheral retina can be referenced at https://bit.ly/3amteRL.
The sound you hear when it is removed is normal due to the viscous fluid at the interface; it does not harm the cornea or affect vision.
The ophthalmology department at Puzi Hospital in Taiwan is open on Monday, Tuesday, Thursday, and Friday mornings from 8:00 AM to 12:00 PM, and on Wednesday afternoons from 2:00 PM to 4:30 PM.
Please note that online responses are for reference only; it is essential to seek medical attention at a healthcare facility if necessary.
I hope to have the opportunity to serve you.
Gao Pilin

Reply Date: 2020/04/21

More Info


When it comes to pupil dilation and the subsequent examination of the eyes, it is understandable to have concerns about the sounds and sensations experienced during the process. Let's break down your questions and concerns regarding the eye examination, particularly focusing on the use of dilation drops and the examination techniques employed by your doctor.

Firstly, pupil dilation is a common procedure used in eye examinations to allow the doctor to get a better view of the internal structures of the eye, particularly the retina and optic nerve. The drops used for dilation temporarily paralyze the muscles that constrict the pupil, causing it to widen. This allows for a more comprehensive examination of the eye's interior, which is crucial for diagnosing various conditions, including glaucoma, retinal detachment, and macular degeneration.

Regarding the sound you heard during the examination, it is not uncommon for patients to experience a sensation or sound when the doctor uses a lens or magnifying device that comes into close contact with the eye. The sound you described, often likened to a "pop" or "snap," can occur due to the release of suction or pressure when the device is removed. This is typically a normal occurrence and is not indicative of any harm to the eye. The use of artificial tears or a viscous solution on the lens helps to create a smooth interface, reducing friction and discomfort during the examination.

As for your concern about whether this examination technique could harm your cornea or affect your vision, it is important to note that trained eye care professionals are skilled in performing these procedures safely. The devices used are designed to be gentle and are applied with care to minimize any risk of injury. While some patients may experience temporary discomfort or a sensation of pressure, serious complications are rare. If you have any lingering discomfort or visual changes following the examination, it is advisable to follow up with your eye care provider for further evaluation.

In terms of the safety of the examination, it is essential to communicate any discomfort or anxiety you may feel during the process to your doctor. They can adjust their technique or provide additional reassurance to help you feel more comfortable. Remember, your eye health is paramount, and your doctor is there to ensure that you receive the best care possible.

In conclusion, while the sounds and sensations experienced during a pupil dilation examination can be concerning, they are typically normal and not indicative of harm. The procedure is designed to enhance the doctor's ability to assess your eye health thoroughly. If you have ongoing concerns about your vision or any symptoms you experience after the examination, do not hesitate to reach out to your eye care professional for further guidance and support. Your peace of mind and eye health are of utmost importance.

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