Retina, Ophthalmology FAQ

Understanding High Myopia, Astigmatism, and Visual Field Defects in Ophthalmology

Visual field concerns? What are the definitions for high myopia, high astigmatism, and high hyperopia in terms of diopter measurements? It seems that different websites provide varying definitions. Is the physiological blind spot located on the nasal side of the retina, meaning t...

Dr. Gao Pilin Reply:
Hello, Xin: Since the degree is a numerical value, it can have various different values. The term "height" refers to a large value, so its definition can vary. There is no need to be overly strict about the terminology, but it can all be referenced. The physiological bl...

Can Non-Dilated Fundus Exams with Slit Lamp Assess Peripheral Retina?

Fundus examination In a non-dilated state, using a slit lamp with a contact lens for fundus examination, is it possible to assess the peripheral retina, or can it only evaluate the macula and optic nerve?

Dr. Gao Pilin Reply:
Hello, if you are concerned about retinal issues: for peripheral examination, I will perform a dilated fundus examination. However, if we are examining the macula and optic nerve, dilation may not be necessary.

Do I Need a Dilated Eye Exam After Seeing Flashing Lights?

Fundoscopic examination? Hello doctor, I experienced flashes in my vision, so I went to the ophthalmologist today for an examination. They only used a slit lamp and did not perform a fundus examination. I asked the doctor if dilation was necessary, and they said it wasn't. S...

Dr. Gao Pilin Reply:
Dear ophthalmology patient, if the doctor says it's not necessary, then there should be no issues. However, if you are still concerned, it is also acceptable to have another examination to put your mind at ease.

Understanding Retinal Issues: Common Questions and Concerns

Retinal-related issues? Thank you for the previous response, Doctor. I would like to ask you some additional questions: 1. When I visited the ophthalmologist, the doctor mentioned that my optic nerve and macula were normal, and my eyes were healthy. Can this be understood as th...

Dr. Gao Pilin Reply:
Hello Mr. Fang: 1. The optic nerve and macula are normal, indicating that the posterior pole of the eye is normal. It is not possible to determine if there is any thinning or holes in the retina. 2. The sensation of flashes caused by retinal traction may not always be prominent. ...

Understanding Post-Cataract Surgery Complications: A Patient's Guide

Complications arising after cataract surgery? Hello Doctor: My mother is 71 years old and has recently undergone cataract surgery on her first eye. She has a history of retinal tear treated with laser and has issues with macular degeneration and wrinkling. Unfortunately, after th...

Dr. He Jianxian Reply:
Hello: The cause of this subjective symptom is actually unclear, so there are no specific solutions to offer. If the examination results are all normal, then it is advisable to continue monitoring and observe. Dr. He Jianxian, Ophthalmology Department, Nantou Hospital.

Can I Wear Contact Lenses After Retinal Laser Surgery?

Post-Retinal Laser Surgery Excuse me, doctor! I would like to ask if it is okay to wear contact lenses (daily disposables) after undergoing retinal detachment laser surgery, as it has been two weeks since the procedure and my follow-up examinations have shown no issues. Thank you...

Dr. Gao Pilin Reply:
Hello Kathy: There should be no problem. Retinal detachment laser surgery is performed inside the eye, and wearing contact lenses should not have any impact.

Understanding Nystagmus: Symptoms, Challenges, and Visual Impacts

Nystagmus Hello, may I ask if nystagmus can also have a large amplitude and high frequency? Does a larger amplitude make the appearance more noticeable, or is it the high frequency? Is it true that not every person with congenital nystagmus experiences oscillopsia? Furthermore, d...

Dr. Gao Pilin Reply:
Hello, Xin: The amplitude of nystagmus can vary, with some being large and others small, and the speed can also range from fast to slow. Naturally, larger amplitudes are easier to detect. The frequency is not always consistent; sometimes it is very fast, and if one does not pay c...

Flashing Lights Around Eyes When Coughing: What You Need to Know

Flashes of light around the eyes during coughing, more pronounced in a dark room? Hello Doctor, I have only received email replies stating: "The physician recommends: Please wait for a response." Since there has been no further communication, I am raising my question ag...

Dr. Gao Pilin Reply:
Hello Kelvin: After I responded with "I will answer you shortly," I will provide you with an answer. You just need to return to the original question to see the response. I'm not sure why you haven't seen it. There are answers in the following two links: https...

Understanding Eye Flashes and Floaters: Causes and Treatments

Flashes in the eyes, retinal issues? Dear Dr. Gao, I have myopia in both eyes, approximately 400 degrees. A few months ago, while studying, I often strained my eyes, and about three months ago (in May of this year), I started experiencing floaters. I went to an ophthalmologist f...

Dr. Gao Pilin Reply:
Hello, Ah Yan: 1. It is usually unrelated to fatigue and is a normal physiological degeneration. 2. The eye drops are intended to alleviate discomfort in the eyes and are not related to the prevention of retinal detachment. 3. Most cases do not result in sequelae, and symptoms wi...

Flashing Lights in Eyes When Coughing: Causes and Concerns

Flashes of light in the eyes during coughing? Hello Doctor, I have been diagnosed with COVID-19 and have been at home for the past few days. I have been experiencing coughing symptoms, and today I noticed that during my coughing fits this morning, certain areas around my eyes wou...

Dr. Gao Pilin Reply:
Hello Kelvin: In response to your question in post #184817, the link https://bit.ly/3PQq8et has already provided an answer, which you may have missed. I would like to clarify again: experiencing flashes of light while coughing is a physiological phenomenon and is not a cause for ...

Understanding Floaters: Common Questions About Eye Health and Vision

Questions related to floaters? Myopia: left eye -200, right eye -0; astigmatism: both eyes -275. When I look at a white wall with one eye (both eyes are open), after a while, I notice some yellow spots in my field of vision that seem to float around like floaters. I have the foll...

Dr. Gao Pilin Reply:
Hello Mr. Fang: 1. Sometimes, faint floaters may appear light yellow due to the refraction of light. 2. Typically, the decision is made based on the areas that are being pulled. 3. Elevated intraocular pressure can damage the optic nerve.

Flashing Lights Around Eyes When Coughing: Causes and Concerns

Experiencing flashes of light around the eyes when coughing? Hello Doctor, I have been diagnosed with COVID-19 and have been at home for the past few days. I have been experiencing a cough, and today I noticed that when I cough, certain areas around my eyes seem to flash briefly,...

Dr. Gao Pilin Reply:
Hello Kelvin: Coughing with flashes is a physiological phenomenon and is not a cause for concern. Please refer to: https://bit.ly/3oIFpSL

Understanding Retinal Laser Treatment: Concerns and Clarifications

Retinal laser therapy Hello, Doctor. I am the person who previously inquired about having undergone laser treatment at another clinic, but no holes or laser marks were found during the examination. Recently, I went to another ophthalmology clinic, and again, no holes or laser mar...

Dr. Gao Pilin Reply:
Hello, the distinction between laser marks and melanin can sometimes be challenging. However, the type of laser should be identifiable. Different lasers may not necessarily emit green light. Peripheral lasers should not cause macular folds.

Understanding Eye Flickering and Headaches After Trauma: What to Know

Eye discomfort? The left half of my vision experienced a flashing spot that lasted for about 15 minutes before returning to normal. During this time, I couldn't see clearly around the flashing area. A couple of days ago, I was hit below the eye while playing basketball, resu...

Dr. Cai Wenyuan Reply:
It is recommended to seek medical examination.

Understanding Visual Field Defects: Symptoms, Causes, and Concerns

Visual field defect Following up on my previous question, I asked the doctor about my peripheral vision appearing to flicker like turning a light on and off. The doctor mentioned that this could potentially indicate a visual field defect, possibly related to glaucoma or retinal d...

Dr. Gao Pilin Reply:
Hello, Awang: It is possible that the blackouts are caused by carotid artery issues. Cold temperatures may cause vasoconstriction, worsening the condition. Visual field defects should be assessed using a visual field test, as early defects may sometimes go unnoticed by the indivi...

When is the Right Time for Preventive Laser Treatment for Retinal Detachment?

When is the most appropriate time to perform laser treatment for the prevention of retinal detachment? Dear Doctor, I have myopia in both eyes, approximately -1100 and -1200. Four months ago, I visited a doctor, and the examination revealed that the upper part of my retina is th...

Dr. Gao Pilin Reply:
Hello, confused person: When is laser treatment needed? It is necessary when the retina may be too thin and at risk of a tear, or if there is already a tear present. Of course, the timing for this needs to be determined by an ophthalmologist. When the doctor recommends the proced...

Understanding Laser Treatment for Floaters: Are There Hidden Risks?

Retinal laser treatment without scarring? Hello, Doctor. In the past, I visited a small clinic to check for floaters and underwent retinal laser treatment. (Later, I found out that this clinic had numerous negative reviews.) However, subsequent examinations at several other hospi...

Dr. Gao Pilin Reply:
Hello, if it is located very peripherally, a 3-mirror lens must be used to visualize it. Therefore, not seeing any traces does not necessarily mean that the procedure was not performed; it simply means it was not visible. Please rest assured that peripheral laser treatment will n...

Understanding Wavy Vision Distortion in High Myopia Patients

Wavy vision distortion? I would like to ask the doctor, I have high myopia, but after examination, there are no issues with the macula, no retinal tears, and no glaucoma. However, I have noticed that in my right eye on the right side and in my left eye on the left side (it seems ...

Dr. Gao Pilin Reply:
Hello, Ah Da: The water ripples are likely caused by the liquefaction of the vitreous body, rather than a distortion of vision. If the examination shows no issues, you can be reassured.

Understanding Flickering Lines in the Corner of Your Eye: Causes and Solutions

There is a flickering line sensation in the corner of the right eye? Both eyes have high myopia, with the left eye approximately -1350 diopters and the right eye approximately -1700 diopters. Both eyes have undergone retinal repair. Recently, in the past year, I have experienced ...

Dr. Gao Pilin Reply:
Hello, concerning the flashes of light caused by vitreous traction on the retina, they can persist for a period of time and may sometimes be continuous. However, as long as you have been examined and found to have no issues, you can feel reassured. It can also serve as a baseline...

Understanding Visual Afterimages: When to Consult an Eye Specialist

Visual persistence question? OR minor question? Dear Doctor, I apologize for bothering you again. This morning, while washing my face, I accidentally splashed some water from the basin into my eyes. Currently, my vision is clear with no blurriness, no red lights, and no dark sha...

Dr. Gao Pilin Reply:
Hello, Wanfu: If water from a basin comes into contact with your eyes, it should not be a concern. Staring at a black background with white text for an extended period can cause afterimages, which is a normal physiological phenomenon and not something to worry about. The same goe...

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