answersLogoWhite

0


Best Answer

1.57 mid index single vision lenses means that the lens is thinner than standard plastic lenses. It is not the thinnest possible, nor is it impact resistant like Trivex 1.53 mid index lenses, or polycarbonate. It will be thinner than either of those materials.

Single vision means that there is one range of vision. If a bifocal lens is not prescribed, then this is what the vision is. When the prescription is a bifocal prescription, then either distance only or reading only must be chosen.

User Avatar

Wiki User

13y ago
This answer is:
User Avatar

Add your answer:

Earn +20 pts
Q: What is a 1.57 mid index single vision lens?
Write your answer...
Submit
Still have questions?
magnify glass
imp
Continue Learning about Biology

What is the total NADH produced in one turn of the citric acid cycle?

there are 6 Nadph2 produced when it turns twice in the kreb cycle because there are 3 NAdH and when you use the kreb cycle twice the equation would be 3 nadh + p= 3 nadph * 2 = 6 NADPH2 - sixth grader in jhs 157


Peritoneal fluid culture?

DefinitionPeritoneal fluid culture is a laboratory test performed on a sample of peritoneal fluid to detect bacteria or fungi that cause infection (peritonitis).Peritoneal fluid is the fluid from the peritoneal cavity, a space between the wall of the abdomen and the organs inside.Alternative NamesCulture - peritoneal fluidHow the test is performedThe test is performed by abdominal tap(paracentesis), a needle aspiration of the peritoneal cavity. A sample of fluid is sent to the laboratory for Gram stain and culture. The sample is examined regularly for bacterial growth.How to prepare for the testEmpty your bladder before your abdominal tap procedure.How the test will feelA small area in your lower abdomen will be cleaned with germ-killing medicine (antiseptic). You will also receive local anesthesia. You will feel pressure as the needle is inserted. If a large amount of fluid is withdrawn, you may feel dizzy or lightheaded.Why the test is performedThe test is done to find out if there is an infection in the peritoneal space.Normal ValuesPeritoneal fluid is a sterile fluid, so normally no bacteria or fungi are present.What abnormal results meanThe growth of any microorganism, such as bacteria or fungi, from peritoneal fluid is abnormal and indicates peritonitis.What the risks areThere is a small risk of the needle puncturing the bowel, bladder, or a blood vessel in the abdomen. This may result in bowel perforation, bleeding, and infection.Special considerationsThe diagnosis of peritonitis is based on more than just the peritoneal fluid culture (which may be negative even if you have peritonitis).ReferencesGarcia-Tsao G. Cirrhosis and its sequelae. In: Goldman L, Ausiello D, eds. Cecil Medicine. 23rd ed. Philadelphia, Pa: Saunders Elsevier; 2007:chap 157.


B and T cell screen?

DefinitionA B and T cell screen is a laboratory test to determine the amount of T and B cells (lymphocytes) in the blood.Alternative NamesDirect immunofluorescence; E-rosetting; T and B lymphocyte assays; B and T lymphocyte assaysHow the test is performedBlood is drawn from a vein, usually from the inside of the elbow or the back of the hand. The site is cleaned with germ-killing medicine (antiseptic). The health care provider wraps an elastic band around the upper arm to apply pressure to the area and make the vein swell with blood.Next, the health care provider gently inserts a needle into the vein. The blood collects into an airtight vial or tube attached to the needle. The elastic band is removed from your arm.Once the blood has been collected, the needle is removed, and the puncture site is covered to stop any bleeding.Blood could also be obtained by capillary sample(fingerstick, or heelstick in infants).After the blood is drawn it goes through a two-step process. First, the lymphocytes are separated from other blood parts. Once the cells are separated, identifiers are added to distinguish between T and B cells. The E-rosetting test identifies T cells and direct immunofluorescence is used to identify B cells.How to prepare for the testTell your health care provider if you have had any of the following, which might affect your T and B cell count:ChemotherapySurgerySteroid therapyStressX-raysRecent infectionHow the test will feelWhen the needle is inserted to draw blood, some people feel moderate pain, while others feel only a prick or stinging sensation. Afterward, there may be some throbbing.Why the test is performedYour doctor may order this test if you have signs of certain diseases that weaken the immune system. It may also be used to distinguish between cancerous and noncancerous disease, especially cancers that involve the blood and bone marrow.The test may also be used to determine how well treatment for certain conditions is working.Normal ValuesNormal value ranges may vary slightly among different laboratories. Talk to your doctor about the meaning of your specific test results.What abnormal results meanAbnormal T and B cell counts suggest possible diseases. Further testing is needed to confirm a diagnosis.An increased T cell count may be due to:Infectious mononucleosisMultiple myelomaAcute lymphoblastic leukemiaChronic lymphocytic leukemiaAn increased B cell count may be due to:Chronic lymphocytic leukemiaMultiple myelomaWaldenstrom's macroglobulinemiaDiGeorge syndromeA decreased T cell count may be due to:Congenital T-cell deficiency disease Nezelof syndromeDiGeorge syndromeWiskott-Aldrich syndromeAcquired T-cell deficiency states HIV infectionHTLV-1 infectionB cell proliferative disorders Acquired immunodeficiency syndromeChronic lymphocytic leukemiaWaldenstrom's macroglobulinemiaA decreased B cell count may be due to:Acute lymphoblastic leukemiaCongenital immunoglobulin deficiency disordersAcquired immunoglobulin deficiency disordersWhat the risks areVeins and arteries vary in size from one patient to another and from one side of the body to the other. Obtaining a blood sample from some people may be more difficult than from others.Other risks associated with having blood drawn are slight but may include:Excessive bleedingFainting or feeling light-headedHematoma (blood accumulating under the skin)Infection (a slight risk any time the skin is broken)ReferencesBagby GC. Leukopenia and leukocytosis. In: Goldman L, Ausiello D, eds. Cecil Medicine. 23rd ed. Philadelphia, Pa: Saunders Elsevier;2007:chap 173.


Related questions

Who is the JETS single game playoff rushing record?

157 yards per game


What is the difference between a 3157 k and 4057 k bulb?

*157 is a double filament. a *057 is a single.


What is 66 percent of 157?

66% of 157= 66% * 157= 0.66 * 157= 103.62


What is the prime factorization of 157?

157 1 X 157 so the answer is 1 X 157


Who wrote the answer to what are the factors of 157?

Factors of 157 are: 1 and 157.


What are the factors of 157?

The positive integer factors of 157 are 1 and 157.


What kind of trees are cut in amazon every year?

Every single tree you can emagine! 157 species are extinct each year.


How many miles is the Oakwood Arms Hotel Co Clare from Dublin?

About 157 miles, or 218 kilometres.About 157 miles, or 218 kilometres.About 157 miles, or 218 kilometres.About 157 miles, or 218 kilometres.About 157 miles, or 218 kilometres.About 157 miles, or 218 kilometres.About 157 miles, or 218 kilometres.About 157 miles, or 218 kilometres.About 157 miles, or 218 kilometres.About 157 miles, or 218 kilometres.About 157 miles, or 218 kilometres.


What times what equals 157?

157 x 1


What is the binary valu of 157?

157 as a binary number is 10011011


Is 157 composite?

No, 157 is prime.


What are the multiplies of 157?

multiples of 157 would be 157, 314, 471, 628, etc.