Understanding Diplopia: Causes, Diagnosis, and Treatment Options
Diplopia (double vision) issues? Hello Doctor: I was involved in a car accident last June, resulting in an open fracture of the frontal bone, as well as fractures of the orbital bone, zygomatic bone, and skull base. After the swelling around my eyes subsided, I experienced double...
Dr. Zhang Yanrui reply Ophthalmology
Hello: Due to your facial bone fracture, there has been damage to the extraocular muscles or the oculomotor nerve, making complete recovery difficult. If surgery is required, the principle must be to achieve single vision when looking straight ahead; achieving single vision in ot...[Read More] Understanding Diplopia: Causes, Diagnosis, and Treatment Options
Dealing with Discomfort: Issues with Contact Lens Wear
Issues with Wearing Contact Lenses Dear Dr. Chang, I wear rigid gas permeable contact lenses, but every time I put them on, my eyes often feel itchy. Initially, my vision becomes blurry with each blink, and then it clears up. I usually apply lubricating eye drops, but they only ...
Dr. Zhang Yanrui reply Ophthalmology
Rigid gas permeable (RGP) contact lenses can shift slightly after blinking, which may cause a few seconds of blurred vision. This movement facilitates tear exchange and allows for better oxygen permeability, which is one reason why RGP lenses have a higher oxygen transmissibility...[Read More] Dealing with Discomfort: Issues with Contact Lens Wear
Understanding Astigmatism and Myopia: Do You Need Toric Lenses?
Astigmatism and myopia? Hello Doctor: I am nearing my age with myopia of R875-150 and L650-125. Is it possible that my condition will not worsen? Also, can I wear contact lenses without astigmatism correction? The optical shop said that wearing the full prescription is sufficient...
Dr. Zhang Yanrui reply Ophthalmology
If you are over the age of 25, your vision will not worsen unless there are other eye conditions, such as cataracts or degenerative myopia. Generally, standard non-toric soft contact lenses can correct astigmatism of less than one diopter, while rigid gas permeable lenses can cor...[Read More] Understanding Astigmatism and Myopia: Do You Need Toric Lenses?
Eye Care Tips for Those Using Magnifying Glasses Daily
excuse me? I have to use a magnifying glass with a light for work every day, and by the end of the day, my eyes are red and very tired. I have gradually noticed that I am becoming light-sensitive and experiencing blurriness. Sometimes, when I look at things, they appear blurry wi...
Dr. Zhang Yanrui reply Ophthalmology
Hello: First, I would like to know your age. If you are over thirty years old and have been working at close distances for extended periods (several hours or more), you may experience symptoms similar to presbyopia, such as difficulty focusing, light sensitivity, and fatigue. The...[Read More] Eye Care Tips for Those Using Magnifying Glasses Daily
How to Maintain Eye Health and Prevent Vision Loss as You Age
Aging I currently have a vision prescription of around 700 to 800 diopters in both eyes. I really regret my past actions! In my youth, I was reckless and didn't understand the consequences. Now that I am an adult, I want to know if taking good care of my eyes from now on wil...
Dr. Zhang Yanrui reply Ophthalmology
Hello, I cannot provide you with a specific probability, but I can help you analyze your situation. Based on your prescription, it is not considered extremely high myopia, and the chance of completely "losing your sight" due to this is less than one percent. However, so...[Read More] How to Maintain Eye Health and Prevent Vision Loss as You Age
Understanding Flashing Lights and Floaters in High Myopia
The appearance of small light spots in the eyes? Hello Doctor: I have high myopia and also experience floaters. Sometimes I see small light spots in my vision that disappear when I blink. On sunny days, I am sensitive to light and have difficulty opening my eyes. When lying down,...
Dr. Zhang Yanrui reply Ophthalmology
This is because you have high myopia, which causes the vitreous body to liquefy earlier than normal. This results in uneven light transmission within the eye, leading to the perception of denser opacities floating in the vitreous.[Read More] Understanding Flashing Lights and Floaters in High Myopia
Understanding Floaters: Concerns and Insights for Eye Health
Regarding floaters? Hello! After reading the detailed responses from various doctors regarding floaters, I have gained a better understanding of this condition. However, I feel that the number of black spots in my vision is increasing, and I am quite anxious about it, fearing tha...
Dr. Zhang Yanrui reply Ophthalmology
If it really increases, you must be cautious and undergo a dilated eye exam to confirm there are no retinal tears. If it is confirmed that there are no tears, regular check-ups are still recommended. Floaters typically do not go away, and you may need to adapt to them![Read More] Understanding Floaters: Concerns and Insights for Eye Health
Effective Methods to Slightly Improve Vision Without New Glasses
Methods for Slightly Improving Vision Hello, Doctor: I have a small question to ask you. I am 25 years old, and my myopia is approximately -950 diopters in both eyes. Recently, I got a new pair of glasses, but I noticed that the prescription for the right lens seems slightly insu...
Dr. Zhang Yanrui reply Ophthalmology
I apologize, but at the age of 25, myopia is generally stabilized, and pseudomyopia is relatively rare, making it difficult to reduce the degree solely with eye drops. However, you might consider trying cycloplegic eye drops; just keep in mind that unless you are still like a chi...[Read More] Effective Methods to Slightly Improve Vision Without New Glasses
Understanding Eye Flashes and Floaters: When to Seek Help
Occasional flashes of light in the eyes? Hello, doctor. Since I was young, I have noticed some gray strands floating in my right eye (possibly floaters). Later, I developed myopia, which is now around -800 diopters (with over -100 diopters of astigmatism). The symptoms persist, a...
Dr. Zhang Yanrui reply Ophthalmology
Actually, if there is a detailed examination after dilation, it is not necessarily required to change doctors. However, if there are "lightning" type visual disturbances, it may be necessary to have follow-up appointments every one to two weeks, as this indicates that t...[Read More] Understanding Eye Flashes and Floaters: When to Seek Help
Understanding Mydriatics and Contact Lens Use in Eye Care
Pupil Dilation Agents and Contact Lenses Hello Dr. Chang: I would like to ask at what age the effects of mydriatic agents typically diminish? Additionally, for someone who has worn contact lenses for an extended period of over 3 to 4 years, will they have difficulty adjusting to ...
Dr. Zhang Yanrui reply Ophthalmology
Pupil-dilating eye drops are generally used until puberty, but if myopia continues to worsen, it may be necessary to use them into the twenties, with significant individual variation. When wearing contact lenses, there is no issue with pupillary distance, so it may take a few day...[Read More] Understanding Mydriatics and Contact Lens Use in Eye Care
Understanding Retinal Artery Issues: Misdiagnosis or Recovery?
Questions about retinal artery vessels? Hello, doctor. Several years ago, I was involved in a car accident that resulted in a contusion to my right eye, leaving me nearly blind. I visited various major hospitals in Taiwan, but none were able to restore my vision. Doctors determin...
Dr. Zhang Yanrui reply Ophthalmology
This gentleman is very pleased that your condition has improved. He advises you to continue regular follow-up appointments to monitor your treatment. The mechanisms causing poor vision are numerous and complex, so it is essential to adhere to your treatment plan and trust the jud...[Read More] Understanding Retinal Artery Issues: Misdiagnosis or Recovery?
Understanding Your Eyeglass Prescription: Is 0.6 or 0.8 Better for You?
Orthodontic issues? Hello, doctor. I have myopia of -7.50 and astigmatism of -2.25 in my left eye, and myopia of -7.00 and astigmatism of -2.25 in my right eye. I have undergone laser treatment for a retinal tear, and my current glasses prescription is -7.25 x -2.25 for the left ...
Dr. Zhang Yanrui reply Ophthalmology
Retinal laser treatment is generally performed in the peripheral areas, so it has minimal impact on vision. Most individuals experience poor retinal function due to myopia itself. Prolonged computer use can lead to eye fatigue, resulting in a feeling of heaviness or discomfort. T...[Read More] Understanding Your Eyeglass Prescription: Is 0.6 or 0.8 Better for You?
Understanding Myopia Measurements: Hard vs. Soft Contact Lenses
Measurement of Myopia Degree I would like to ask a question... Today I went to get my glasses prescription. I visited two different places, and since I wear rigid gas permeable contact lenses, the first place advised me to temporarily switch to daily disposable lenses and come ba...
Dr. Zhang Yanrui reply Ophthalmology
Rigid contact lenses can affect the curvature of the cornea due to their compressive effect; however, improper use of soft contact lenses can lead to corneal edema, which also impacts the accuracy of measurements. Wearing rigid lenses is less likely to cause neovascularization be...[Read More] Understanding Myopia Measurements: Hard vs. Soft Contact Lenses
Is Laser Eye Surgery Free for Military Personnel in Taiwan?
Laser eye surgery Hello, doctor. I have high myopia... Currently, I am serving in the military and receiving treatment at a military hospital for free. I would like to know if laser vision correction surgery is also free of charge. Thank you for your response.
Dr. Zhang Yanrui reply Ophthalmology
Sir, you truly have an imagination; laser surgery cannot be free![Read More] Is Laser Eye Surgery Free for Military Personnel in Taiwan?
Sudden Blurry Vision: Causes and Solutions for Eye Health Issues
Sudden blurred vision? Hello, doctor. Yesterday morning (11/04), I woke up feeling dizzy. My vision was unfocused, and I had dry mouth (unable to produce saliva). Normally, I wear glasses, but now I can see far away clearly while my near vision is blurry. I have to hold things fa...
Dr. Zhang Yanrui reply Ophthalmology
Your symptoms are typical of autonomic nervous system dysfunction, which is a complex systemic condition. The ocular symptoms are just a small part of it; therefore, it is essential to collaborate closely with a neurologist for treatment, as there may be more severe complications...[Read More] Sudden Blurry Vision: Causes and Solutions for Eye Health Issues
Understanding Corneal Inflammation: Risks and Treatment Options
Keratitis Hello Doctor: Recently, my eyes have been filled with blood vessels, and I am sensitive to light and experiencing foreign body sensations. When I consulted a doctor, they said I have corneal inflammation, and the blood vessels are extending towards the center of my corn...
Dr. Zhang Yanrui reply Ophthalmology
Are you referring to contact lenses? Typically, the presence of neovascularization indicates that you have been wearing them for too long or that the contact lenses have poor oxygen permeability. If the blood vessels grow into the center of the cornea, it can lead to the death of...[Read More] Understanding Corneal Inflammation: Risks and Treatment Options
Understanding Macular Degeneration: Causes, Symptoms, and Treatment Options
Macular degeneration Hello Dr. Chang, I am a person with high myopia. For the past one to two years, my vision tests have not been able to reach 1.0. Even with stronger lenses, I can only see 0.6 in one eye and 0.8 in the other. However, when looking at the eye chart, it's ...
Dr. Zhang Yanrui reply Ophthalmology
Rigid gas permeable (RGP) contact lenses are indeed healthier for the eyes, but they have the drawback of causing a significant foreign body sensation. Additionally, in the afternoon, a layer of lipids can form on the lenses, preventing tears from adhering properly, which leads t...[Read More] Understanding Macular Degeneration: Causes, Symptoms, and Treatment Options
Are Contact Lenses Causing Your Headaches and Fatigue?
Issues with contact lenses? I often experience headaches and fatigue when wearing contact lenses, but sometimes I don't have headaches. Does this mean that contact lenses are not suitable for me?
Dr. Zhang Yanrui reply Ophthalmology
Headaches and fatigue may be caused by an incorrect prescription for contact lenses or poor astigmatism correction, so it is advisable to investigate the issue further.[Read More] Are Contact Lenses Causing Your Headaches and Fatigue?
Understanding Discomfort with Rigid Contact Lenses for High Myopia
Rigid gas permeable contact lenses Dear Doctor, I haven't worn contact lenses for a year. Previously, I used soft lenses, but recently I switched to rigid gas permeable lenses, as I've heard they are better for people with high myopia like me. However, after wearing th...
Dr. Zhang Yanrui reply Ophthalmology
Rigid gas permeable contact lenses are indeed healthier for the eyes, but they have the drawback of causing a significant foreign body sensation. Additionally, in the afternoon, a layer of lipids can form on the lenses, preventing tears from adhering properly and leading to blurr...[Read More] Understanding Discomfort with Rigid Contact Lenses for High Myopia
Understanding Laser Eye Surgery: Options, Risks, and Costs
About laser surgery? Hello, I have a prescription of -1075 diopters in both eyes. However, I feel very uncomfortable wearing glasses, so I have been using soft contact lenses. Unfortunately, my eyes become easily fatigued and dry, and I experience some temporary discomfort with e...
Dr. Zhang Yanrui reply Ophthalmology
Based on your prescription, you are indeed a suitable candidate for laser surgery for myopia, but it is essential to confirm that your corneal thickness is sufficient to accommodate such a degree of correction. Currently, the success rate of laser surgery for myopia is extremely ...[Read More] Understanding Laser Eye Surgery: Options, Risks, and Costs