Dr. Thai-Binh Nguyen O.D., Optometrist
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Dr. Thai-Binh Nguyen O.D.


9324 Garvey Ave Suite A South El Monte California, 91733


At iPrecision Optometry, we strive to provide the best comprehensive family eyecare possible. We also provide our patients with medical eye services such as diagnosis and treatment/management of red eyes, ocular allergies, infectious conjunctivitis, dry eyes, corneal abrasions, corneal foreign body removal, cataracts, glaucoma, age-related macular degeneration, diabetic retinopathy.

Education and Training

OD at the Western University of Health Sciences College of Optometry

Provider Details

MaleEnglish 10 years of experience
Dr. Thai-Binh Nguyen O.D.
Dr. Thai-Binh Nguyen O.D.'s Expert Contributions
  • Eye floater after traveling?

    You need to see an eye care professional immediately to have a dilated fundus exam (DFE) to determine if your retina is intact and to see if there's any bleeding in the area that controls the central vision (macular area). It may just be an ordinary floater that just developed and is non-emergent; however, you won't know until you get a DFE by an eye care professional. READ MORE

  • What should I do?

    Correction: Please use "preservative-free artificial tears" It seems like you have what we medically call a "subconjunctival hemorrhage" or a broken blood vessel in layman terms. Please don't rub your eyes, but instead use any over the counter preservative-free artificial tears at least 4-5 times per day to keep the area moist and your eyes more comfortable. I usually recommend using Refresh Relieva PF. The bloody area where the broken blood vessel occurred will resolve in about a week or so. READ MORE

  • Detached retina?

    I would recommend visiting your eye care professional so that he/she can perform a dilated fundus exam to check to see if you have a tear or possibly detached retina in your left eye. Are the flashes of light constant? Are you experiencing an increase in the number of floaters? Do you see a black curtain of vision where the bottom part of your vision is dark when you cover your right eye? Also, is your diabetes under control? Uncontrolled diabetes can cause bleeding in the back of the eye (retina), which can lead to black spots in your vision. Again, please visit your eye care professional immediately to get the proper evaluation and possible treatment if needed. READ MORE

  • Is it ok to wear reading glasses all the time?

    Yes if you do required reading glasses to read near material, then it is recommended that you wear prescription reading glasses that are appropriate for your working distance at near when you are reading a book to give you clear and comfortable vision. READ MORE

  • Why was one eye bloodshot when I woke up?

    Sometimes the tiny blood vessels in your eye can break for unknown reasons and cause your eyes to be bloodshot. It usually takes about 1 or 2 weeks for the blood in your eye to drain back into your body. The medical term for this condition is called a "subconjunctival hemorrhage" and it is usually harmless and doesn't affect your vision. READ MORE

  • Can I wear contacts with dry eyes?

    I would recommend taking care of your dry eye problem before attempting to wear contact lenses. It really depends on the severity of your dry eyes to be an ideal candidate for wearing contact lenses comfortably. If you have a severe dry eye problem, then it really does not matter which brand of contacts you attempt to wear because your eyes will be even more dry than without the contacts. I would recommend visiting your local eye care professional to determine if you are an ideal contact lens candidate, and perhaps have him/her perform a dry eye evaluation. READ MORE

  • Is there a surgery to remove eye floaters?

    Yes, vitrectomy is a surgical procedure that removes floaters by removing the gel-like substance (vitreous) in your eye. This procedure is performed for patients who suffer from very severe symptoms of floaters that are adversely affecting their vision. READ MORE

  • Can high blood pressure cause blurry vision?

    Yes, high blood pressure can cause damage to the blood vessels that supply blood to your eyes, which can cause damage to the retina (area in the back of your eye that collects light) which leads to blurred vision and sometimes vision loss. READ MORE

  • What happens if you rub your eye with contacts in?

    Do NOT rub your eyes with or without contacts, since it may cause the following eye issues: eye getting more irritated and red, corneal abrasion (scratch on your eyes) due to a torn contact lens while scratching your eyes, change in your prescription (change in astigmatism) due to trauma to cornea, or may cause development of keratoconus (a condition where the cornea becomes progressively thinner and cause distorted and blurry vision). READ MORE

  • Which contact lens is best for dry eyes?

    Depending on the severity of your dry eyes, you may or may not be an ideal candidate for contact lens wear. However, patients with mild to moderate dry eyes can still wear contact lenses. I usually prescribe daily disposable contact lenses for my dry eye patients who are able to wear contacts, since you don't have to clean the contact lenses daily (protein deposits on the contact lens can occur if you incorrectly clean the contacts, which can worsen your dry eyes). There's many different brands of daily wear contacts in the market with different levels of effectiveness, so it would be up to you and your eye care professional to decide which daily brand would best fit your visual needs. READ MORE

  • Does an eye pressure test hurt?

    No, an eye pressure test should NOT hurt your eyes. There are several methods to measure eye pressure such as non-contact method where an air puff (where you will feel a gentle puff of air on your eyes) is used to measure eye pressure, or contact method where a probe, dye, and anesthesia are used to measure the eye pressure. There's also another contact method that uses a portable instrument with a lightweight probe without the use of anesthesia. READ MORE

  • How often should contacts be replaced?

    It depends on the type of contact lens you are currently wearing. Is it soft contact lens or a rigid/hard contact lens? There's daily disposable soft contacts where you would wear for the entire day, and then dispose them. There's 2 week disposable contacts where you would clean daily with a multipurpose solution and store your contacts in a contact lens case daily, but would need to dispose the contacts at the end of the 2 week period. There's monthly soft contacts where you clean and store your contacts like the 2 week soft contacts but you would dispose of them at the end of the 30 day period. For rigid/hard contacts, you will usually need to clean them with a multipurpose solution and store them in a lens case daily, but these lenses usually can be used for several months. Be sure to follow your eye care professional's recommendations on your specific contact lens wear regimen and maintenance. READ MORE

  • How do I know if my contacts are old?

    If you are wearing contact lenses, it's really important that you follow your eye care professional's recommendation on both contact lens maintenance and wearing schedule. If you wear monthly soft contacts over the recommended 30 days, then you may feel irritated and blurry vision due to protein deposits on the contact lenses. You may also notice that the soft contact lenses are more rigid/harder than normal when you wear them, which may indicate an older soft contact lens. READ MORE

  • Can cheap sunglasses ruin my vision?

    Sunglasses without ultraviolet light (UV) protection can ruin your vision by causing the development of cataracts (cloudiness of your natural lens in your eye which can lead to blurry and double vision), degeneration of the macula (cause blindness of your central vision), and even rare eye related cancers. Just be sure that your sunglasses have UV protection embedded in the lens, which will prevent UVA and UVB from entering your eye and causing possible damage to your eye. Definitely look for sunglasses with labels that say "100% protection against UVA and UVB." READ MORE

  • What helps red eyes fast?

    There's a eye drop called 'Lumify" which is designed to relieve red eyes due to minor eye irritations in adults. It usually works in 1 minute or less, and lasts up to 8 hours (you can use it up to 4 times per day). You should definitely stop using the product if you experience any increased redness, eye pain, or visual changes, and consult an eye care professional for help. NOTE: Red eyes can be caused by many factors, and if you are currently experiencing red eyes that last for a longer time than normal, then it's recommended that you seek/visit your eye care professional for a thorough eye exam to determine what the underlying factor(s) that may be causing the long term red eye effects. READ MORE

  • What are the best foods for healthy eyes?

    The best way to improve your eyesight naturally is to consume foods rich in antioxidants. Antioxidants such as lutein can be found in green leafy vegetables such as kale and spinach. Vitamin A from carrots also helps to improve our vision at night. My immediate concern for your 7-year-old daughter is that she is watching too much TV and tablet use, which can cause increased myopic (nearsightedness) progression, which in turn may cause vision loss. I would high recommend you monitor and reduce the amount of usage of near devices such as tablets (iPads, cell phones, etc). READ MORE

  • Should I wear glasses all the time for myopia?

    Depending on your myopic prescription, it is advisable to wear your glasses full-time to experience clear and comfortable vision. However, there are exceptions, such as some myopic individuals who are able to read at near without the use of his/her prescription glasses. At your age, you shouldn't expect too much a change in your distance prescription, but you can expect that your near/up close vision will begin to gradually change (it may start to fluctuate or get blurry when you read up close) due your lens in your eye weakening as you age. READ MORE

  • Is it worth getting Lasik after 40?

    Most LASIK candidates will correct both eyes so that you can improve your distance vision; however, your near/up close vision will not change. So if you are currently wearing reading glasses to help you see better at near, having LASIK will still require to wear reading glasses at near. There's also monovision LASIK where one eye is corrected to see far while the other eye is corrected to see at near; however, your depth perception would be severely affected. If you are interested in LASIK, I would recommend seeking a qualified eye care professional to see if you are an ideal candidate for LASIK and what your options are. Personally, I don't recommend my patients who are over 40 years old and require reading glasses to have LASIK procedure, since they will still need to wear glasses up close. READ MORE

  • What are the best eye drops for dry eye?

    It really depends on what type of dry eye (evaporative or aqueous deficient) you have and the severity of the dry eye condition. If you are unsure on what type of dry eye you have, then I would highly recommend you visit your local eye care professional to have a dry eye evaluation. I usually recommend 'Systane Complete' drops to my dry eye patients with a mixed form (both evaporative and aqueous deficient) of dry eyes. If my patient has evaporative dry eye then I usually recommend either 'Soothe XP' or 'Refresh Optive Mega 3' eye drops. If they have aqueous deficient dry eyes, then I usually recommend 'Systane Hydrate PF' or 'Refresh Relieva PF' (both are preservative free). Most people who have dry eye have some form of both types of dry eye, so using 'Systane Complete' may help to relieve your dry eye symptoms. Again, seeking the help of your eyecare professional is your best bet, since he/she will be able to properly evaluate and treat your dry eye condition appropriately. READ MORE

  • Why are my eyes constantly red and swollen?

    First of all, you should seek the advice of a medical professional to help with testing for possible autoimmune disease if you are concerned. As for your red and swollen eyes, it may be due to the side effects of your medications that you are currently taking to treat asthma and allergies. Asthmanex can cause inflammation of the sinuses (sinusitis), which in turn can cause eye pain and swelling. In addition, many allergy medications such as Zyrtec can cause dry eyes, which in turn can also cause red eyes. Albuterol can cause eyelid swelling and restlessness (which can cause insomnia). Finally, I would recommend you visit your healthcare professional to make sure that you are currently taking the appropriate medications and dosages for your medical conditions, which in turn may help you reduce or eliminate the eye symptoms that you are currently experiencing. READ MORE

Areas of expertise and specialization

Primary Care/Family Optometry


  • Walmart Project Foresight Award - Best Business Plan, 2011   
  • Western University College of Optometry Faculty Scholarship, 2010   

Professional Memberships

  • California Optometric Association  
  • American Optometric Association  

Dr. Thai-Binh Nguyen O.D.'s Practice location

9324 Garvey Ave Suite A -
South El Monte, California 91733
Get Direction
New patients: 626-350-8026

Iprecision Optometry

9324 Garvey Ave Ste A -
South El Monte, CA 91733
Get Direction
New patients: 626-350-8026

Dr. Thai-Binh Nguyen O.D.'s reviews

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