Vitreous is the substance that fills the middle of the eye. Posterior vitreous detachment (PVD) occurs when the vitreous pulls away from the retina.

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A medical professional can use OCT to help diagnose AMD. It can be suitable for helping diagnose both early and advanced-stage AMD.

If your equation has more than one solution enter the equation as y = equation, then solve for y = 0 and update the starting x value. For example, y = x^2 - 10x - 36, "Shift Solve", y = 0, x = -7 will return x_1 = -2.8 while x = 15 will return x_2 = 12.8.

I think it's some setting problem. Equation solver worked well. But after my daughter played with the calculator, equation solver crashed.

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Central serous retinopathy is a condition that occurs when fluid builds up under the retina. Medical professionals may also refer to this condition as central serous chorioretinopathy.

In some cases, an ophthalmologist may administer dilating eye drops before the procedure. This is to help widen the pupil to make imaging easier.

Optical coherence tomography

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Trying to solve for x in the equation 10x^9 - 9x^10 = 0.75. When I put the equation into an online equation solver, I get the solution where x = 1.063 and 0.9036. For the particular problem I am working, x is only defined between 0 and 1. Therefore, the answer is 0.9036. However, when I put the equation into my Casion fx-115ES Plus, it will only return the answer of 1.063. Is there a way I can get it to return the other value of x?

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Are you following the instructions accurately? Press equals at the "Solve for X" screen to calculate the solution. Make sure you're not confusing the starting point value which you can set with the actual solution to the equation obtained by pressing equals.

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The previous value of x is shown as the starting point for the calculation. After pressing Solve and entering a starting point (or using the existing starting point), you need to press equals. Please follow the instructions closely and let me know if you’re still having issues.

Prolonged high blood sugar levels can damage the retina. This occurs when diabetes damages the blood vessels that supply the retina with blood.

An ophthalmologist may use OCT to help confirm a diagnosis if a person is displaying symptoms of certain eye conditions. Below are the symptoms that may lead an ophthalmologist to use OCT.

i am having an issue where after presssing solve i get the value of x in my previous equation, not the present equation that i am solving. Can someone please help with this?

The first value of x as found by the numerical method will be provided on the screen and is saved to the X variable. The difference between the left expression and the right expression is shown as the solution to L–R.

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Is there any hack that can increase the time before the fx-991, or fx-115 times-out and turns itself off? Very frustrating because I lose my calculation history.

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Furthermore, the Newton-Raphson numerical method only returns one value. To find another value, change the start point at step 4. For example, if there are two solutions, one positive and one negative, and you find the positive one, enter a negative number for the start point to find the negative answer.

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Read on to learn more about how OCT works. This article also explains the conditions that OCT can help with and what happens during the procedure.

Optical coherence tomography (OCT) is a type of noninvasive imaging test. Ophthalmologists use OCT to create high-resolution, cross-sectional images of the inside of a person’s eye.

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The macula is a small area in the center of the retina. It plays a role in helping people clearly see the details of objects.

OCT can help an ophthalmologist see the different layers of the retina. This helps them map and measure the thickness of these layers.

A person may not experience any symptoms if they have early stage glaucoma. Over time, a person may slowly experience vision loss.

How do I know what Newton-Raphson value to change it to? For example, if I'm solving a quadratic equation, there should be two x values, however I'm only able to get one???

Glaucoma is a group of eye diseases that damage the optic nerve. Glaucoma can lead to a person experiencing vision loss and blindness.

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I have a problem when I shift solve an equation with atleast 3 variables it replace the value of the other variable, for example i have a b and x instead on finding x it finds the value of b and replaces its value how can I fix it classwiz 991

OCT can also help medical professionals diagnose optic nerve disorders. This is because an ophthalmologist can use OCT to spot changes to the fibers of the optic nerve.

Optical coherence tomography (OCT) is a form of noninvasive imaging test that creates high-resolution, cross-sectional images of the inside of a person’s eye.

Solving equations is possible with the equation solver in the fx-991ES PLUS or fx-991EX calculator's shift-solve functionality. Once the equation has been entered, the calculator uses the Newton-Raphson numerical method to solve the equation. Because the equation solver uses a numerical method, it only works with equations with a single variable, but can find multiple values.

OCT can help an ophthalmologist diagnose a number of medical conditions including problems with the macula, AMD, glaucoma, and different types of retinopathy.

When solving for a variable using SHIFT+SOLVE, how to I make the L-R equal to 0? because from time to time the L-R value is not 0 so there are inaccuracy in the answer

They must then remain still and follow the instructions of the person carrying out the procedure. These instructions will direct the person to look in certain directions throughout the scan.

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Thanks loads for this very informative example. I recently purchased a Casio fx-991EX through Amazon because my previous calculator, a Casio FX-115 ( the for-runner of this one) died after 20 years. The documentation that comes with the Fx-991EX is not the best. I've been trying for several days to solve even the simplest quadratic equations with no success. They wanted me to enter the data using a "Coeffiicent editor" which was complex. I was on the verge of returning my calculator back to Amazon before my 30 days return period ran out. Then I got the idea of googling online to see if anyone else had a similar problem. I found your example ONLINE and no longer am planning to return my calculator.

During the scan, a person may focus on a target within the scanner. They may also see a red line appear during the scan.

During OCT, an ophthalmologist uses a beam of light to scan an area of a person’s eye. The OCT device then measures the light that the structures within the eye have reflected back.

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i have a problem when it show the number it show a wrong answer for example it show 9999960 instead of 120 how can i fix it?

During a CT scan, a medical professional aims the X-rays at a part of the person’s body and quickly rotates them around the body. The CT scanner processes the signals that these X-rays produce. The CT scanner then creates cross-sectional images.

OCT is not the same as a computed tomography (CT) scan. OCT uses light rays to create images, and CT scans use X-ray beams.

The OCT device then uses these measurements to create images of a person’s retina that are cross-sectional and three-dimensional.

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OCTinterpretation PDF

Without treatment, diabetic retinopathy can lead to blindness. OCT can help a medical professional diagnose diabetic retinopathy.

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If a person has received dilating eye drops during OCT, their eye may be sensitive to light for several hours after the procedure.

In its early stages, diabetic retinopathy usually does not cause symptoms. Some people may notice changes in their vision, such as problems seeing things that are far away.

Caveats: As mentioned, this only works with equations with one variable. The variable can be used multiple times, as shown in this example, however you can't use two or more variables such as x and y. If you wish to use more than one variable, you need to use the quadratic equation solve.

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PVD can cause a person to develop vitreous traction. This is a condition that occurs when part of the vitreous remains stuck to the macula during PVD. This part of the vitreous then pulls on the macula, causing symptoms of vitreous traction.

Yes… That’s not the solution, that’s the stating point for the numerical method. At the second screen, type your starting point and press equals, as I said.

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How can I simplify an equation, like simplify/add/subtract a polynomial. ex; -h^6 + 4h^5 -3h^4 + 2h^5 -9h^6. This would be simplified as 6h^5 - 10h^6 - 3h^4. How would you simplify that on a calculator

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Measuring the thickness of the different layers of a person’s retina can help an ophthalmologist diagnose a number of medical conditions, such as age-related macular degeneration (AMD) and glaucoma.

If it's okay to ask here. I am trying to solve this eqn 10/x = cosh(50/x) - 1 and it's giving me an error. Any idea why?

You have to think about how Newton-Raphson will be able to find the other value. It's easier if you know how the method works. If not, I guess you can just try a number far from the solution you've found but it might take too long for the calculator (or be in the wrong direction).

By allowing an ophthalmologist to do all the above, OCT can help them diagnose certain eye disorders and guide specific treatments.