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Last night when I slept everything is fine but when I wake up I found that from my left eye I can't see clearly whereas right is completely okay I washed it but nothing happened I used eye tone drops but still nothing happens. What is this and what will I do?
1) when person has to take videonystagmography. When it is essential for person to take video nyatagmography? When it is recommended by doctor? 2) which reading of nystagmus is accurate? 1) reading of nystagmus on slit lamp? Or 2) reading of nystagmus in video nystagmography?
My son is 1.5 years old, today he had wound with blood clot near by eye, and its become bulge also, what shall I do? please help me out.
I'm 23 years old. My eyes are feeling tired and I'm feeling drowsy and dizzy unable to concentrate and feeling very tired. I am sleeping more than enough. But this condition makes me disturbed always and irritating. Please suggest to get rid of this completely.
My eyes are yellow from many years. But there is no problem. But I want to remove it. Give me a suggestion to avoid this?
I am a teenager. I'd been feeling back pain while resting on bed everyday. It started a long time ago. I don't know how it started. I used to use computer for about 14 hrs a day. Please tell.
I got my eyes operated in 2010 since then I have developed white patches around them particularly on lower side. Please advice.
My eye prescription in 2016 Right eye- SPH: -5.00, CYL: -0.25, AXIS: 170, V/A 6/6 Left eye- SPH -4.50, CYL: -0.25, AXIS: 20, V/A 6/6 So, can I apply for NDA Exam.
A common headache can have a number of reasons behind it, such as defective vision, hetrophoria or convergence deficiency, etc. Now, the question arises as to how they can cause headache. Read on to know more...
Q. Why should defective vision cause headache?
To attain a perfect vision, eyes with defective vision have to make sustained extra efforts, which results in headache. Even if the refractive error is very small, it can be the cause of headache. More prolonged the working and smaller the print, higher the incidence of headache.
Q. Can this occur at all ages?
Yes, it can occur at all ages. However, with age, the resistance decreases and hence elderly people are more prone to get headache. More the use of computer, mobiles, TV or prolonged studies precipitates headache
Q What is Hetrophoria?
Normally, both eyes always remain parallel, but in some cases, eyes have slight tendency to develop minor squint, may be convergent or divergent. This is called Hetrophoria or Latent squint. Such patients have to take extra strain to keep the eyes straight
Q. What is convergence deficiency?
For reading, both eyes have to converge and if there is weakness of convergence, extra strain has to be put on the eyes, which cause headache.
Q. What is the ideal method of refraction in young patients, I,e below 40 years?
Ideal method is to dilate the pupil with Tropicasyl plus drops. This has the advantage that the doctor can see the retina and Optic Disc. This is important to exclude any involvement of brain as the cause of headache. It also relaxes accommodation and hence provides correct refraction. In cases of Hypermetropia, it is extremely essential to dilate the pupil.
Q. What is the role of Autorefractmeter (a computer) in refraction?
It is a very important instrument to provide correct refraction, but it cannot be totally relied upon. Some opticians rely on it and give wrong numbers.
Q. What is acceptance Test?
You have refracted the eyes with Autorefractmeter or Streak Retinoscope but exact power is what a patient accepts. This is very important.
Q. What is astigmatism?
There is a difference in refraction in different meridians and it is important that a cylinder number is prescribed in correct axis. This is a difficult task and needs lot of experience.
Q. Is it important to correct astigmatism?
To relieve headache and strain on the eyes, it is very important that exact cylinder is prescribed.
Q. What is the role of exact centring of Optical Lenses?
.You may give correct number, but if the centre of the Optical lenses and cornea do not coincide, satisfactory results are not obtained. To dispense correct lenses is a big art and the Optician must be qualified and well experienced.
Q. Does the quality of lens affect the visual comfort?
Yes, it is important that quality of lenses should be good, preferable fibre lenses which are Ant reflect coated. Crizal coating with capability to block the UV rays are very popular.
Conclusion: Refractive errors are important cause of headache and needs proper examination of the eyes, preferably after dilating the pupil. Astigmatic error even if too small may be the cause of headache. Spectacle dispensing is an art and a patient must select proper optician. Spectacles if advised for constant use must be used constantly to get full relief.