Understanding Temporary Vision Loss in One Eye: Causes and Recovery
Transient monocular vision loss? Suddenly, my left eye went completely blank, as if shrouded in thick fog. There was no headache, dizziness, or any other bodily abnormalities; I just couldn't see out of my left eye. After about 10 minutes, I began to see a small dot in my fi...
Dr. He Jianxian reply Ophthalmology
Hello QQQ: Based on your description, your condition may be a precursor symptom of a migraine. This type of visual disturbance typically lasts for about ten minutes; some individuals may experience a headache afterward, while others may not. Usually, examinations do not reveal an...[Read More] Understanding Temporary Vision Loss in One Eye: Causes and Recovery
Understanding Pulsating Shadows in Vision: Causes and Solutions
There are dark shadows in the vision that pulse with the heartbeat? Hello: Recently, I have been experiencing shadows in my vision that pulse with my heartbeat after exercising or when my heart rate is elevated. I have a history of floaters, so I thought this might be the cause, ...
Dr. He Jianxian reply Ophthalmology
Hello, Miss Anonymous: The appearance of floaters may be due to vigorous exercise. If the examination shows no significant issues, it is advisable to simply monitor the situation. Dr. Ho Chien-Hsien, Ophthalmology Department, Nantou Hospital.[Read More] Understanding Pulsating Shadows in Vision: Causes and Solutions
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 Ophthalmology
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?
Persistent Left Eyelid Twitching: Causes, Concerns, and Next Steps
The left eyelid has been twitching intermittently for nearly a year? Hello, my left eyelid has been twitching constantly for nearly a year. It feels like there is something inside my eyeball that is expanding and contracting rhythmically, which is very uncomfortable. I have not b...
Dr. He Jianxian reply Ophthalmology
Hello Mr. Lin: The subjective twitching of the eyelid is generally not considered to require treatment in ophthalmology, unless it is accompanied by severe spasms that make it difficult to open the eyes or simultaneous facial twitching. If these two phenomena are present, it is n...[Read More] Persistent Left Eyelid Twitching: Causes, Concerns, and Next Steps
Understanding the Use of Expansion Rings After Cataract Surgery
Placement of an expansion ring after cataract surgery? Hello, doctor. My father had cataract surgery on his left eye in February, and after the surgery, he noticed a black border on the outer side of his vision. He has returned to the surgeon for several check-ups, but there has ...
Dr. He Jianxian reply Ophthalmology
Dear Ms. Wu, 1. Theoretically, it should not be too long, but it is uncertain whether it will affect the lens. 2. In some cases, partial detachment or rupture of the zonules can affect the position of the intraocular lens. The placement of an expansion ring can help improve the ...[Read More] Understanding the Use of Expansion Rings After Cataract Surgery
Understanding Enlarged Optic Nerve Head: Risks and Management
Optic disc cupping is enlarged? Hello Doctor, Last week I visited an ophthalmologist due to conjunctivitis and also asked the doctor to check my optic nerve. The neurologist mentioned that my optic nerve head is larger than normal, approximately 0.6 to 0.7. Consequently, I was ...
Dr. He Jianxian reply Ophthalmology
Hello, Miss Mo: 1. Congenital optic nerve pits are indeed present, but they are not common, and there is no evidence to suggest that they are more likely to lead to glaucoma. 2. This question cannot be answered definitively. 3. Since glaucoma is mostly asymptomatic, regular moni...[Read More] Understanding Enlarged Optic Nerve Head: Risks and Management
Understanding Fixed Black Spots in Vision: Possible Causes and Next Steps
The appearance of a fixed black spot in the vision when looking at distant light sources? Hello Doctor, I apologize for bothering you. A few months ago, I noticed that without my glasses, there is a fixed black circular spot (with a transparent perimeter) that appears in my field...
Dr. He Jianxian reply Ophthalmology
Hello Mr. Turtle: I am unable to understand what situation you are experiencing, because if there is indeed a problem, it typically does not disappear when wearing glasses. Director He Jianxian, Ophthalmology Department, Nantou Hospital.[Read More] Understanding Fixed Black Spots in Vision: Possible Causes and Next Steps
Understanding Yellow Flashes and Visual Disturbances in Eye Health
Waking up suddenly to see yellow flashes of light? Hello Doctor: I have floaters and have previously undergone laser surgery for retinal holes. I am nearsighted with a prescription of about -200 and astigmatism around -300. Recently, I have been experiencing a lot of issues. When...
Dr. He Jianxian reply Ophthalmology
Dear Ms. Anonymous, 1. I cannot explain why your afterimage condition has worsened. 2. I cannot explain why you suddenly woke up to see a bright yellow light that then returned to normal; it may be due to pressure on the eyes, but clinically, it cannot be determined. 3. If you h...[Read More] Understanding Yellow Flashes and Visual Disturbances in Eye Health
Is Long-Term Use of Mydriatics Safe for Open-Angle Glaucoma Patients?
Is it suitable for patients with open-angle glaucoma to use mydriatics long-term to relieve eye fatigue? Hello, I am a 54-year-old patient with open-angle glaucoma, cataracts, and myopia. 1. What are the indications for using mydriatic agents in ophthalmology? From the informat...
Dr. He Jianxian reply Ophthalmology
Dear Ms. Li, 1. Mydriatic agents are not intended for routine use to alleviate eye fatigue, and this applies to both glaucoma and non-glaucoma patients. 2. Clinically, the routine use of mydriatic agents as a choice for relieving eye fatigue is not recommended; please discuss th...[Read More] Is Long-Term Use of Mydriatics Safe for Open-Angle Glaucoma Patients?
Post-Retinal Detachment Surgery: Addressing Vision Distortion and Misalignment
After retinal detachment surgery, there is a distortion in the visual field and the images from both eyes cannot be fused? Hello! About a year ago, I underwent retinal detachment surgery on my right eye. Due to a strong inflammatory response because of my young age, the doctor me...
Dr. He Jianxian reply Ophthalmology
Dear Mr. Hsu, The distortion or deformation of the visual field caused by retinal surgery or disease is indeed very challenging to address. The possibility of treatment and improvement varies from person to person, and it is essential to follow up with your surgeon for specific...[Read More] Post-Retinal Detachment Surgery: Addressing Vision Distortion and Misalignment
Understanding Vitreous Degeneration: Causes and Concerns for Young Adults
Vitreous degeneration Vitreous degeneration, also known as vitreous syneresis, can occur due to various factors, including aging, but it is not typically caused by prolonged smartphone use. At 18 years old, it is uncommon to experience significant vitreous degeneration. Your refr...
Dr. He Jianxian reply Ophthalmology
Dear Sir, There are many causes of vitreous degeneration, with age being the primary factor. The older a person gets, the more likely they are to experience degeneration. Additional factors that can exacerbate this degeneration include trauma, inflammation, high myopia, and sur...[Read More] Understanding Vitreous Degeneration: Causes and Concerns for Young Adults
Understanding Eye Pressure and Dry Eye Syndrome: Key Concerns and Solutions
Intraocular pressure and dry eye syndrome issues? Hello Doctor, I would like to ask: 1. When I visit the clinic, my intraocular pressure is often measured at 19-20 mmHg. I am concerned that this borderline level indicates that my eye pressure might be high at certain times of the...
Dr. He Jianxian reply Ophthalmology
Hello Mr. Chang: 1. Your intraocular pressure appears to be normal. If you are concerned, please have the ophthalmologist check your optic nerve cupping during your next visit. If the cup-to-disc ratio is normal, then it is considered normal. 2. Insufficient tear production is ac...[Read More] Understanding Eye Pressure and Dry Eye Syndrome: Key Concerns and Solutions
Understanding Chalazia: Expert Answers to Your Eyelid Concerns
Inquiry Consultation Hello Dr. He: I have a chalazion at the front of the eyelashes on my right eyelid. I previously attempted to puncture it with a cleaned fine needle, but the surface is somewhat hard and I couldn't break it; also, since the chalazion is close to my eyebal...
Dr. He Jianxian reply Ophthalmology
Hello Mr. Kris: If you have a stye or chalazion that needs to be addressed, it is advisable to seek treatment from an ophthalmologist. Some may resolve on their own, while others may not. Applying warm compresses is theoretically a feasible and helpful approach. This is provided ...[Read More] Understanding Chalazia: Expert Answers to Your Eyelid Concerns
Understanding Retinal Risks in High Myopia After Head Trauma
High myopia and retinal issues? Hello Doctor, I have approximately 1000 degrees of myopia. About 10 years ago, I underwent retinal laser treatment. After being hit on the head (not the eyes) by a ball six months ago, I found that my retina had thinned and underwent another laser ...
Dr. He Jianxian reply Ophthalmology
Dear Mr. Anonymous: Pressing on the eye while sleeping and being struck by a ball are indeed different scenarios. The duration of pressure applied differs; the impact from a ball is sudden and intense, which can more easily lead to issues with the retina. After such an impact, ...[Read More] Understanding Retinal Risks in High Myopia After Head Trauma
Understanding Retinal Detachment Recovery: Nutrition, Timing, and Vision Correction
Vision restoration Hello Doctor: I experienced a retinal detachment unexpectedly, without any external force, and I do not have myopia or hypertension. I underwent surgical treatment earlier this month, and my vision has improved from 0.3 pre-operation to 0.5 two weeks post-opera...
Dr. He Jianxian reply Ophthalmology
Dear Miss Lin, 1. Regarding dietary supplements, I am not an ophthalmology specialist and cannot provide appropriate advice. 2. In fact, undergoing surgery as soon as possible after the occurrence will lead to a more favorable recovery. The timeline for recovery varies from pers...[Read More] Understanding Retinal Detachment Recovery: Nutrition, Timing, and Vision Correction
Concerns After Eye Examination: Understanding Oscillopsia and Eye Safety
Eye Consultation Inquiry Dear Dr. He, Hello. Yesterday (March 22), I went to the ophthalmology department for a dilated fundus examination. During the instillation of the dilating drops, the nurse accidentally touched my right eyeball with a cotton swab (long cotton stick). Alth...
Dr. He Jianxian reply Ophthalmology
Hello Mr. Kris: 1. If the cotton swab caused any injury, you would likely feel significant discomfort. Since you have not experienced any discomfort, it is unlikely that your eye has sustained any serious damage. 2 & 3. Generally, neither dilation nor a cotton swab injury ...[Read More] Concerns After Eye Examination: Understanding Oscillopsia and Eye Safety
Post-COVID Symptoms: Understanding Floaters and Vision Changes
Symptoms of floaters after a COVID-19 diagnosis? Hello Doctor, I was diagnosed with COVID-19 at the end of January, and a week later, I noticed symptoms of floaters in my eyes. Initially, it was very noticeable in my right eye, where I could see black specks. Since then, it has b...
Dr. He Jianxian reply Ophthalmology
Hello Ms. C: Floaters are primarily caused by vitreous degeneration, and their correlation with the use of electronic devices is unclear. However, there is a stronger association with high myopia, trauma, inflammation, and surgery. As for whether COVID-19 can cause floaters, I am...[Read More] Post-COVID Symptoms: Understanding Floaters and Vision Changes
Understanding Visual Blind Spots: When to Seek Eye Care
Visual field examination Could a visual blind spot be as large as the size of a thumb joint (approximately 15 centimeters away)? When I visited the ophthalmologist, they said it was either due to fatigue or normal. Should I still be concerned?
Dr. He Jianxian reply Ophthalmology
Hello Mr. Long: The location of the blind spot is approximately between 10 to 20 degrees in the peripheral vision, with a size of about 10 degrees. Experienced ophthalmologists can easily identify this. If there are any issues, the doctor will inform you directly, so you should f...[Read More] Understanding Visual Blind Spots: When to Seek Eye Care
Why Frequent Ultra-Widefield Imaging is Crucial After Retinal Surgery
Why is it necessary to perform intensive ultra-wide-angle photography? On December 22, 2023, I underwent a vitrectomy due to a dislocated lens caused by being hit by a badminton shuttlecock. The lens was removed, and the damaged areas of the retina were treated with laser. Howeve...
Dr. He Jianxian reply Ophthalmology
Hello Ms. Anonymous: When performing wide-angle photography, it is important to check whether the retina is fully attached. Even if this procedure is not done, it may still be necessary to dilate the pupils to examine the fundus, as the underlying purpose is the same. Dr. Ho Chie...[Read More] Why Frequent Ultra-Widefield Imaging is Crucial After Retinal Surgery
Understanding Posterior Vitreous Detachment and Retinal Issues: Key Questions Answered
Regarding issues related to posterior vitreous detachment and retinal disorders? Hello Doctor: 1. I have always seen black spots in my vision, and a few days ago, I suddenly experienced very rapid movement of black spots at the lower edges of both eyes. After about six to seven...
Dr. He Jianxian reply Ophthalmology
Hello, Mr. Squirrel: 1-3: Posterior vitreous detachment typically occurs in older individuals. However, it can also happen earlier in those with high myopia, inflammation, or injury. It usually occurs suddenly and is often accompanied by noticeable floaters. In such cases, it i...[Read More] Understanding Posterior Vitreous Detachment and Retinal Issues: Key Questions Answered