Top
20
Doctor insights on: What Are The Different Types Of Refractive Errors

Share
1

1
What are the different types of eye refraction corrections?

What are the different types of  eye refraction corrections?

Several: Nearsighted (myopia), farsighted (hyperopia), older age near vision (presbyopia) along with astigmatism (eye is oval) and distortions caused by disease or surgery. ...Read more

Dr. David Kira
108 doctors shared insights

Refractive Surgery (Definition)

LASIK is eye surgery that permanently changes the shape of the cornea (the clear covering on the front of the eye) in order to improve vision and reduce a person's dependency on ...Read more


2

2
What are the different types of eye cancer?

What are the different types of eye cancer?

Eye cancer: The list is very long-- it includes, but is not limited to-- retinoblastoma, melanoma, basal cell carcinoma, squamous cell carcinoma, rhabdomyosarcoma. Some eye cancer has a relatively good prognosis, especially if picked up early. Some eye cancer can be fatal. ...Read more

See 1 more doctor answer
4

4
What are the different types of microcephaly?

What are the different types of microcephaly?

Microcephaly = small: head, or a head circumference for age & gender < 5th %ile. Head growth reflects brain growth. Any genetic or other medical condition that disrupts fetal brain development can cause congenital microcephaly. Any genetic or other medical condition that damages an infant or child's brain or causes degeneration & slows its velocity of growth can cause acquired microcephaly. See below. ...Read more

6

6
Are there different types of eye surgeries to improve vision? What are the differences?

Are there different types of eye surgeries to improve vision? What are the differences?

LASIK, PRK: Lasik and prk are two different approaches to changing the focusing power of the eye to improve vision. There are several older approaches which are used very little anymore. Of course vision can be improved (meaning needing less eyeglass power) after cataract surgery as well. ...Read more

7

7
What are the different types of hemoglobinopathies?

What are the different types of hemoglobinopathies?

Various: These relate to hemoglobin, the molecule that helps transport oxygen, and is made of 4 subunits. Adults have 2alpha & 2beta, while kids have 2alpha & 2gamma. Other minor forms also exist. Any disorder that alters these subunits can lead to hemoglobinopathy, some of which have no significance (d and e) and others that may (thalassemia & sickle cell). ...Read more

8

8
What are the different types of scoliosis?

What are the different types of scoliosis?

Many types: The most common is idiopathic (exact cause unknown, but it runs in families, so it is genetic). It can be caused by degeneration (aging), especially in the low back. It can be caused by neurological problems like cerebral palsy and spinal cord injury (in children). Congenital scoliosis is from abnormalities of spine formation in the womb. It can occur with some forms of spine trauma besides cord. ...Read more

See 1 more doctor answer
9

9
What are the different types of breaks/fractures?

What are the different types of breaks/fractures?

Open, closed, stable: Orthopaedic surgeons use a myriad of terms to describe fractures depending in large part on which bones are invovlved. In general, fractures are open (via break in skin) or closed, stable or unstable, midshaft or juxta-articular, displaced or non-displaced, and comminuted (many parts) or non-comminuted, angulated or non-angulated. Eg: minimally displaced, comminuted midshaft both bone forearm fx. ...Read more

See 1 more doctor answer
10

10
What are the different types of hyperlipidemias?

What are the different types of hyperlipidemias?

Genetic/Aquired: There are basically three major kinds of Hyperlipidemias 1Familial or Genetic 2Aquired 3Idiopatic They can also be be classified according to which lipid is elevated 1Hypercholesreemia 2Hypertriglyceridemia 3Combined Familial type is classifies Type1,2,3,4,5 Aquired Causes are Diabetese,caused by drugs like diuretics ,beta blockers,Hypothyroidism,Metabolic Disorder/Nephrosis. Too vast to cover400L ...Read more

11

11
What are the different types of hepatitis?

What are the different types of hepatitis?

Hepatitis 'types': Hepatitis means inflammation of the liver. This can be due to viruses (hepatitis a, b, c, d or e; epstein-barr, CMV etc) or fat or alcohol or iron or copper deposition or other 'storage diseases' or medications or autoimmune diseases or genetic causes or combinations etc. So - a thorough workup is usually indicated. If left untreated hepatitis from any cause has the potential for complications. ...Read more

See 1 more doctor answer
12

12
What are the different types of diabetes?

What are the different types of diabetes?

Diabetes: There are many types of diabetes. First of all, i imagine that you really mean diabetes mellitus but there is also a condition called diabetes insipidus. The main forms of diabetes are type i and type ii. There are many others with the end result that the blood sugars can reach higher than normal levels. ...Read more

See 1 more doctor answer
13

13
What are the different kinds of macular degeneration?

What are the different kinds of macular degeneration?

Wet and Dry: There are two general forms: dry about 85% which is the slow breakdown of macular pigment and vision decrease. The wet form has a more rapid progression with formation of new blood vessels, severe vision loss and occasionally intraocular hemorrhage. There are new medications which can address this. ...Read more

See 2 more doctor answers
14

14
What are the different types of gestation?

What are the different types of gestation?

Normal: the gestation can be intrauterine or extrauterine. Extrauterine can be ectopic in the tube, ovary, or abdomen ...Read more

15

15
What are the different kinds of color blindness?

What are the different kinds of color blindness?

Several: The major ones are confusion of red and green/ blue and yellow/ and an off green and off red. Most common are subtle forms of these which allow major color differences to be seen. We test these with color confusion plates that are subtle and strong, to make the distinction. Color vision is also lost with advanced diseases like diabetes and retinitis pigmentosa. ...Read more

16

16
What are the different types of barbiturates?

What are the different types of barbiturates?

Barbiturates: 1.Short acting, such as Pentobarbital & Secobarbital. 2.Intermediate acting, such as Amobarbital & Butabarbital. 3.Long acting, such as Mephobarbital & Phenobarbital. ...Read more

17

17
What are the types of glaucoma?

What are the types of glaucoma?

Many types: Typically the types are divided into "causes" or the "drain status" thus primary glaucoma vs. Secondary glaucoma (caused by something that is affecting the drain of the eye) or open angle vs. Closed angle glaucoma basically glaucoma can happen at various pressures that is damaging to the individual patient, so there is no pressure cutoff. ...Read more

See 1 more doctor answer
18

18
What are the different types of amnesia?

What are the different types of amnesia?

I do not remember: Amnesia is a lose of memory. For some events such as trauma, infection, or emotional crisis there can be antegrade amnesia where memory before the event is lost. There can be retrograde amnesia where memory after the event is lost. Or both can occur. Agnosias may occur where just very select things may not be able to be remembered. Famous of these is prosopagnosia - unable to remember faces. ...Read more

19

19
What are the different types of obesities?

What are the different types of obesities?

Yorkshire : Research study identified 6 kinds of obesity clusters. The cluster of Obesity identify groups of people with Obesity arguing that of the clusters may not suffer from obesity related medical and emotional complications. While some clusters have more symptoms . This classifications are not universally accepted ...Read more

20

20
What are refractive errors?

What are refractive errors?

Focusing: Refractive errors are intrinsic poor focus of the eyes. It may mean your eyeball is too long or short or the lens or cornea are of inappropriate power. In most cases, glasses or contact lenses can correct the refractive error fully. ...Read more

See 3 more doctor answers