Refractive Error

Refractive errors are vision problems caused when the irregular shape of the cornea results in problems with the light focusing on the retina. The different types of refractive errors are myopia (nearsightedness), hyperopia (farsightedness), astigmatism, and presbyopia. Refractive errors can be corrected by using eyeglasses, contact lenses, and refractive surgery.

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What can cause blurry image, itchy eyes, and headache?

Query: Hi doctor,I have been having lots of trouble with my eyes lately. Reading glasses are not helping me. Everything has begun to get blurred. I have noticed that I have been rubbing my eyes a lot and I have been getting headaches. Please help.  Read Full »

Dr. Asif Manzoor

Answer: Hi, Welcome to Actually, there are many causes of decreased vision and itching for which you need to rub your eyes.Please answer a few questions. Since how long you are using glasses? When you had your last refraction?Do you have any eye allergy, itching, watering or redness that get wo...  Read Full »

I have a weak eyesight and I am thinking of getting a eye surgery done. However I am worried about it. Please help.

Query: Hi doctor, I have a very weak eyesight of -18 in both eyes. Many surgeries are available, but I am scared to go for them because of the risks. My parents, too, are scared. Please suggest one according to my situation. My right eye has a grey spot that I know is a stuck floater. You will better know ...  Read Full »

Dr. Manjunath Natarajan

Answer: Hi, Welcome to I understand your concern. With a power of - 18D and floaters, I also expect progressive retinal degenerative changes due to myopia. The only refractive surgery option available for you is clear lens extraction. In this procedure, the natural lens of your eye is remove...  Read Full »

Why are my new glasses giving me a headache?

Query: Hello doctor, I am a 21 year old male. This is the fourth time I am changing my spectacles. But this time, the spectacles are hurting my ears and my right eye. And I also have a headache. What do I do?  Read Full »

Dr. Dadapeer. K

Answer: Hello, Welcome to From the history, it seems that you are having a refractive error with frequent change of spectacles. The probable cause for your headache is the change in the refractive error. I advise you to undergo refraction testing and change your spectacles according to the ...  Read Full »

If I do not wear spectacles for an hour,will it increase my eye power?

Query: Hello Doctor, If I do not wear spectacles for an hour everyday, will it increase my eye power or damage my eyes?  Read Full »

Dr. Dadapeer. K

Answer: Hello, Welcome to I reviewed your history. Ideally speaking spectacles should be worn always. However, not wearing spectacles for one hour will not cause much increase in eye power. Hence no need to worry. But make sure you do not forget to wear your spectacles and do not st...  Read Full »

My eyes become blurry and tired when I do some work continuously. What should I do?

Query: Hi doctor,I have a power glass but not using it. If I do one work continuously, my eyes become blurry and tired, such as reading books, washing vessels, etc. What should I do?Please help.  Read Full »

Dr. Akshay U. Nayak

Answer: Hi, Welcome to It looks like you may be having some eye strain. Do not worry, and it is very common nowadays. So I see your strain is worse on doing more near work like reading and washing vessels. So firstly, like you said that you have mild power and you do not wear glasses. I stron...  Read Full »

Why am I not able to see clearly from one eye?

Query: Hello doctor, I have been using only one eye since birth. This is a result of a medicine that my mother took when I was in her womb. My right eye is normal, but the left has a squint. I can see a little light in my left eye, but I cannot really use this eye for seeing. By this time, I got another pr...  Read Full »

Dr. Rahul Vaswani

Answer: Hello, Welcome to You need to get your eyes tested for a refractive error that is glasses or spectacles. You have become nearsighted so get this test by an ophthalmologist. Your left eye has turned inward that is esotropia. You need to consult a pediatric ophthalmologist that is squin...  Read Full »

5-year-old has poor vision. Will eye exercises suffice or does he need glasses?

Query: Hello doctor, My 5-year-old son has poor vision -2.0. He improves his eyesight by doing eye exercises himself. Should he wear eyeglasses?  Read Full »

Dr. Shikha Gupta

Answer: Hello, Welcome to I do not know whether you have got his cycloplegic refraction or not. Is this just auto refractometer finding or final refractive power? Anyways, I will suggest you get a repeat cycloplegic refraction done at a good center by an optometrist who is experienced. Seco...  Read Full »

I have vision problems after laser IOL implant. What to do?

Query: Hello doctor,After the laser IOL implant, I now have severe aniseikonia. Was it the wrong diopter lens? Can it be undone? Very poor and triple vision. What to do?  Read Full »

Dr. Rahul Vaswani

Answer: Hello, Welcome to I shall try to answer all your queries in detail. Aniseikonia occurs when the difference in refractive error is more than 4 or 5 diopters between two eyes. If you say, you had laser-assisted cataract surgery, which means a Femto surgery, the size of the incision woul...  Read Full »

Am I a suitable candidate for bladeless technique LASIK surgery?

Query: Hello doctor, I am interested in LASIK laser. My eye side number is R = - 1.75 and L = -2.25. My cornea focus is 590 590. Please advise me a little bit about customised versus bladeless technique surgery.  Read Full »

Dr. Gargi Madhukar Apte

Answer: Hello, Welcome to I think it is a good decision to go for LASIK as your refractive power and corneal thickness is within requirement, ideally, both eye numbers should be same for LASIK but you may ask your LASIK surgeon regarding this. Also, I prefer bladeless LASIK, that is femtoseco...  Read Full »

Does my baby have squint eyes?

Query: Hello doctor, The query is regarding my 6.5 months old baby girl. She has been seen by two pediatric ophthalmologists. The first one examined her eyes using a Plusoptix vision screener and assured us that everything was normal based on the testing results. He assured us that there was no strabismus....  Read Full »

Dr. Bandivadekar Pooja Mohan

Answer: Hi, Welcome back to The amount of refractive error manifested depends on the cycloplegic medications used and the amount of time elapsed after using the medication. The gold standard for a 2 year old is Atropine ointment for three days followed by retinoscopy. So, if different medic...  Read Full »

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