Visual field test, Ophthalmology FAQ

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Understanding High Myopia: Impact on Retina and Visual Perception

High myopia with enlarged blind spots and retinal degeneration issues? Hello, Doctor. I previously inquired about the issues related to high myopia and the expansion of blind spots, and I have a few more questions I would like to ask: 1. During a previous eye examination, you m...


Dr. Gao Pilin Reply:
Hello: 1. Retinal thinning and brightness perception: High myopia can indeed lead to retinal thinning, particularly around the macula. Thinning of the retina may affect the distribution and function of photoreceptor cells, thereby impacting visual quality. The macular region is...

[Read More] Understanding High Myopia: Impact on Retina and Visual Perception


Can High Myopia Cause Enlarged Blind Spots and Visual Shadows?

Does high myopia cause an expansion of blind spots? + Visual shadows in dimly lit areas? Hello Doctor, I have a few questions I would like to ask. 1. I noticed in the past year or two that when I close one eye, I can see a dark area near my blind spot in both eyes. Previously, ...


Dr. Gao Pilin Reply:
Hello: 1. High myopia and the expansion of the blind spot associated with high myopia (1000 and 1200 diopters) can indeed lead to retinal degeneration, which may affect the structures surrounding the optic nerve, resulting in an enlarged blind spot. Although your OCT scan shows...

[Read More] Can High Myopia Cause Enlarged Blind Spots and Visual Shadows?


Understanding Visual Disturbances: Is It Visual Snow or Something Else?

Visual persistence? Visual snow syndrome? Mental health issues? Hello Doctor, I currently have high myopia in both eyes, close to 900 degrees. Recently, I started experiencing dizziness, which coincided with a change in my glasses. I went to an ophthalmologist to check my prescri...


Dr. Gao Pilin Reply:
Hello: Based on your description, your visual issues may be related to "visual snow" or "visual persistence." These phenomena can be normal in certain situations, but if you suddenly become aware of them and start to worry, it may exacerbate your discomfort. H...

[Read More] Understanding Visual Disturbances: Is It Visual Snow or Something Else?


Understanding Visual Distortions: When to Worry About Your Eyesight

Macula? Hello, Doctor. I have personal myopia of 500-600 degrees and astigmatism of 150-200 degrees. I have an undiagnosed test for glaucoma (the doctor said it is caused by high intraocular pressure), but I am on a fixed regimen of eye drops and have follow-up examinations. On A...


Dr. Gao Pilin Reply:
Hello: The situation you mentioned may be related to eye strain, dry eye syndrome, or high myopia. 1. Lines appearing distorted in the Amsler grid test: If you occasionally notice lines not straight while using the Amsler grid test, but they return to normal after blinking, thi...

[Read More] Understanding Visual Distortions: When to Worry About Your Eyesight


Understanding High Eye Pressure: Insights on Diagnosis and Treatment

Ocular hypertension Hello, Dr. Gao. Due to high myopia, with prescriptions of -800 and -700 diopters, my tonometry readings have reached a maximum of 24 mmHg, mostly ranging between 21 and 22 mmHg. When using a handheld tonometer, the readings are around 18 and 17 mmHg. I have co...


Dr. Gao Pilin Reply:
Hello: Based on the detailed information you provided, here are my recommendations and explanations: 1. Should you continue using eye drops? Given your high myopia and elevated intraocular pressure, you belong to a high-risk group for glaucoma, making the preventive use of intra...

[Read More] Understanding High Eye Pressure: Insights on Diagnosis and Treatment


Understanding Blurry Vision with Soft Contact Lenses: A Guide for High Myopia

One eye is blurry with soft contact lenses? Hello Doctor: I have high myopia (the most recent measurement was two weeks ago: left eye approximately -1200 diopters with astigmatism of -175; right eye approximately -1075 diopters with astigmatism of -175). However, each time I have...


Dr. Gao Pilin Reply:
Hello: Based on the situation you described, there are several possible reasons that could explain your vision fluctuations: 1. Inconsistent prescription between glasses and contact lenses: You mentioned that the prescriptions for your glasses and contact lenses differ, which ma...

[Read More] Understanding Blurry Vision with Soft Contact Lenses: A Guide for High Myopia


Glaucoma or Night Blindness: Understanding Your Eye Condition

Is it glaucoma or night blindness? Hello doctor, I was diagnosed with macular degeneration during my health check-up in January this year. Subsequent follow-up examinations revealed that I have low-tension glaucoma (my eye pressure was approximately 10-15 before using eye drops)....


Dr. He Jianxian Reply:
Dear Confused Individual: Due to the complexity of your condition, it is difficult to provide a recommendation. I suggest you go directly to a medical center for an examination, as you may receive a more accurate diagnosis. Dr. He Jianxian, Department of Ophthalmology, Nantou Hos...

[Read More] Glaucoma or Night Blindness: Understanding Your Eye Condition


Understanding Vision Issues: Thin Optic Nerve and Shadow Symptoms

Regarding visual field issues? Hello doctor, about three months ago, I was diagnosed with thinning of the optic nerve in the upper part of both eyes. The doctor mentioned that the thickness is approximately 79, while the lower part is normal at 100. The night before last, while m...


Dr. Gao Pilin Reply:
Hello: Based on the symptoms you described, the fact that the shadow changes position with the movement of your face suggests that it is less likely to be related to an optic nerve issue. However, an examination is still necessary to clarify the problem. Here are several steps yo...

[Read More] Understanding Vision Issues: Thin Optic Nerve and Shadow Symptoms


Understanding Visual Flicker and Vibration Sensations in Myopia

Visual flickering, vibration sensation? Hello Doctor: I have high myopia and a few months ago I discovered floaters, and recently I've been experiencing flashes. I have visited clinics multiple times, but no issues were found; they suggested it might be a process of posterio...


Dr. Gao Pilin Reply:
Hello: Here are the possible reasons: 1. Posterior Vitreous Detachment: Your doctor mentioned that you may be experiencing posterior vitreous detachment. This can lead to symptoms such as floaters and occasional flashes of light. 2. Visual Disturbance: This sensation is not commo...

[Read More] Understanding Visual Flicker and Vibration Sensations in Myopia


Understanding Retinitis Pigmentosa: Symptoms, Diagnosis, and Vision Changes

Retinitis Pigmentosa Hello Doctor: During my eye examination last year, I was diagnosed with a condition that has resulted in significant floaters and photophobia during the day, as well as persistent flashing at night. I also found out that my night vision is not very good. Sinc...


Dr. Gao Pilin Reply:
Hello: The situation you described indicates that you have been diagnosed with retinitis pigmentosa, and you are experiencing symptoms such as floaters, photophobia, flashes, and night blindness. Your visual field examination results show changes in the peripheral vision, which i...

[Read More] Understanding Retinitis Pigmentosa: Symptoms, Diagnosis, and Vision Changes


Understanding the Link Between Glaucoma and Flashing Lights in Vision

Glaucoma and flashing lights during blinking? Hello, doctor. Recently, I have been experiencing flashes of light when I blink (I have high myopia). This occurs after staying in a dark place for about 10 to 20 minutes and then returning to a bright environment. When I blink, I fee...


Dr. Gao Pilin Reply:
Hello: Based on the symptoms you described, experiencing flashes of light after spending some time in a dark environment and then returning to a bright area may be related to glaucoma or other ophthalmic issues, but it could also be caused by other factors. Here are my responses ...

[Read More] Understanding the Link Between Glaucoma and Flashing Lights in Vision


Post-Laser Treatment Eye Complications: Glaucoma or Anemia Effects?

Three months after laser surgery for retinal tear, suspected glaucoma was found during the examination? Three months ago, I suddenly experienced a large number of floaters and went to the hospital for an examination, where a retinal tear was found in the upper right quadrant of m...


Dr. He Jianxian Reply:
Dear Ms. Hsu, 1. The location of the laser treatment is usually at the periphery and does not significantly affect visual field testing. Since the laser was applied to the upper right corner, any potential visual field loss would likely occur in the lower left quadrant, so your ...

[Read More] Post-Laser Treatment Eye Complications: Glaucoma or Anemia Effects?


Understanding Eye Flashes and Nerve Cupping in High Myopia

Flashes of light; optic nerve cupping? Hello Doctor: A few months ago, I discovered floaters in my vision, and after undergoing dilation, no issues were found at that time. Over the past few months, I have intermittently experienced flashes of light (similar to a light bulb flick...


Dr. Gao Pilin Reply:
Hello: Floaters refer to the appearance of black dots, dust, or small insects in your line of sight, usually caused by floating debris in the vitreous body. If the symptoms of flashes change significantly and persist, it is advisable to seek medical evaluation promptly. If they a...

[Read More] Understanding Eye Flashes and Nerve Cupping in High Myopia


Sudden Blackout in Vision: Understanding Eye Health Concerns

The eyes quickly turn black for a second? Hello Doctor: I have high myopia and a few months ago I discovered I have floaters, so I have been frequently visiting clinics for check-ups, even going to a retina specialist for further examinations. I went once at the end of February, ...


Dr. Gao Pilin Reply:
Hello: The symptoms and medical history you described, particularly the high myopia and the previous occurrence of floaters, are indeed concerning. High myopia increases the risk of retinal issues, including retinal tears and retinal detachment. Although the physician did not fin...

[Read More] Sudden Blackout in Vision: Understanding Eye Health Concerns


Understanding Asymmetrical Peripheral Vision: Causes and Concerns

Issues with peripheral vision in both eyes? Hello Doctor, I recently noticed that the afterimage in my left eye seems to be clearer than in my right eye. Additionally, I feel like my eyeball has a bit of difficulty turning to the right when looking at the afterimage on that side ...


Dr. Gao Pilin Reply:
Hello: 1. The afterimage in your left eye appears clearer than in your right eye, and you feel a slight difficulty in turning your eyeball to the right: This sensation may be related to visual coordination between your eyes. Sometimes, the coordination can be affected, leading ...

[Read More] Understanding Asymmetrical Peripheral Vision: Causes and Concerns


Understanding Low Optic Nerve Fiber Thickness and Its Implications for Glaucoma

Optic nerve fibers Hello, doctor. Last week, I went to an optical shop for an OCT examination, and it showed that my optic nerve fibers are low, with measurements of 72 and 69 for each eye. My intraocular pressure was normal except for the low optic nerve fiber count. They sugges...


Dr. Liang Ce Reply:
We recommend that you: 1. Discuss the above situation further with your attending physician. 2. Consider consulting another ophthalmology clinic for a second opinion. Wishing you good health. Thank you!

[Read More] Understanding Low Optic Nerve Fiber Thickness and Its Implications for Glaucoma


Understanding Pediatric Glaucoma: A Parent's Guide to Diagnosis and Treatment

Pediatric glaucoma My daughter is 5 years old and does not have myopia. During a routine check-up at the end of June last year, the doctor noticed a difference in the optic nerves of her left and right eyes, with a significant cupping of the left optic nerve head. She was referre...


Dr. Liang Ce Reply:
We recommend that you: 1. Discuss the above situation further with your attending physician. 2. Alternatively, consult at a medical center for advice. Wishing you good health. Thank you!

[Read More] Understanding Pediatric Glaucoma: A Parent's Guide to Diagnosis and Treatment


Understanding Eye Health: My Journey from Hyperopia to Possible Myopia

About the Eyes Hello, Doctor. After a 7-year gap, I went for an eye examination and discovered something surprising! When I was younger (at least before my first year of college), I clearly remember being diagnosed with high hyperopia, approximately +500 diopters in each eye, and...


Dr. Gao Pilin Reply:
Hello: [Question 1] Based on your description, you have noticed a decrease in your hyperopia during a recent ophthalmic examination, and your corrected vision has improved. This may indicate that your visual condition is changing, as the refractive power of the eyes can vary at...

[Read More] Understanding Eye Health: My Journey from Hyperopia to Possible Myopia


Understanding Thinning of the Optic Nerve Fibers and Glaucoma Risks

Optic nerve fiber thinning Hello, Doctor~~ Over the past six years, my intraocular pressure has increased from an initial 18-19 to 26-27 this year, and I was subsequently diagnosed with suspected glaucoma! The doctor noted that my optic nerve fibers have thinned, and after perfor...


Dr. Gao Pilin Reply:
Hello: Based on your description, your intraocular pressure has increased from 18 and 19 to 26 and 27 over the past six years, with thinning of the optic nerve fibers. The OCT examination shows abnormalities in the inferior quadrant of the left eye, but the visual field test is n...

[Read More] Understanding Thinning of the Optic Nerve Fibers and Glaucoma Risks


Understanding Macular Health: Insights on OCT and Eye Pressure Management

Macular issues Hello Doctor, due to high intraocular pressure, my doctor scheduled my first OCT examination in mid-January. The results showed that the optic nerve portions of both eyes are thinner than average (indicated in yellow). However, the doctor mentioned that two reports...


Dr. Gao Pilin Reply:
Hello: Based on your description, you underwent an OCT examination, and the report indicates that the optic nerve in both eyes is thinner than average. However, two reports need to be compared to confirm whether this is indicative of pre-glaucoma. Additionally, the values for the...

[Read More] Understanding Macular Health: Insights on OCT and Eye Pressure Management


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