Podcast
Questions and Answers
What should be done if only one minus sign is visible in the keratometric mires?
What should be done if only one minus sign is visible in the keratometric mires?
- Ensure the patient’s forehead is secure against the headrest.
- Ensure that fellow eye is occluded.
- The occluder is in the way. (correct)
- Patient's eyelid is drooping, have them open wide.
How can the power range of a keratometer be extended?
How can the power range of a keratometer be extended?
- By using loose lenses over the opening of the keratometer barrel. (correct)
- By increasing the distance between the patient's forehead and the headrest.
- By adjusting the mire clarity setting.
- By using a +2.00D loose lens.
In keratometry, what should be done if patient gaze is unsteady?
In keratometry, what should be done if patient gaze is unsteady?
- Remind the patient to blink frequently.
- Adjust the chinrest position.
- Use a loose lens to stabilize the gaze.
- Ensure that fellow eye is occluded. (correct)
What could be a reason for H&V mires not being measureable concurrently in keratometry?
What could be a reason for H&V mires not being measureable concurrently in keratometry?
When should a +1.25D loose lens be used in keratometry?
When should a +1.25D loose lens be used in keratometry?
What action should be taken if mire focus is transient when performing keratometry?
What action should be taken if mire focus is transient when performing keratometry?
What is the primary purpose of a keratometer?
What is the primary purpose of a keratometer?
In keratometry, what is the significance of mire distortion?
In keratometry, what is the significance of mire distortion?
How does corneal astigmatism differ from refractive astigmatism?
How does corneal astigmatism differ from refractive astigmatism?
What is a possible reason for corneal and refractive astigmatism not coinciding?
What is a possible reason for corneal and refractive astigmatism not coinciding?
Which component of a keratometer determines the axis and power of astigmatism?
Which component of a keratometer determines the axis and power of astigmatism?
How does the design of a keratometer aid in determining corneal surface curvature?
How does the design of a keratometer aid in determining corneal surface curvature?
What should be done if irregular astigmatism is present during keratometry?
What should be done if irregular astigmatism is present during keratometry?
Which type of astigmatism has more power in the vertical meridian?
Which type of astigmatism has more power in the vertical meridian?
In which case should patients with dry eyes be asked to blink or use artificial tears before keratometry?
In which case should patients with dry eyes be asked to blink or use artificial tears before keratometry?
What should you do if you observe distorted mires during keratometry?
What should you do if you observe distorted mires during keratometry?
How are the principal meridians positioned in Oblique Astigmatism?
How are the principal meridians positioned in Oblique Astigmatism?
What should be done if the two principal meridians are not 90 degrees apart during keratometry?
What should be done if the two principal meridians are not 90 degrees apart during keratometry?
What should be done if CC axis is ATR according to Javal's Rule when applying it practically?
What should be done if CC axis is ATR according to Javal's Rule when applying it practically?
In the practice example 43.00@180/46.00@090, what would be the total refractive astigmatism using Javal's Rule?
In the practice example 43.00@180/46.00@090, what would be the total refractive astigmatism using Javal's Rule?
When CC axis is WTR as per Javal's Rule in practical application, what should be done to the total refractive astigmatism?
When CC axis is WTR as per Javal's Rule in practical application, what should be done to the total refractive astigmatism?
If the Simplified Form of Javal’s Rule gives a result of -1.50x180 for a specific case, what was the initial Keratometric astigmatism?
If the Simplified Form of Javal’s Rule gives a result of -1.50x180 for a specific case, what was the initial Keratometric astigmatism?
In a practical scenario where the CC is -2.00@090, according to Javal's Rule, what would be the total refractive astigmatism?
In a practical scenario where the CC is -2.00@090, according to Javal's Rule, what would be the total refractive astigmatism?
What is the purpose of applying a +1.25D lens in front of the barrel in keratometry when the K reading is over 52.00D?
What is the purpose of applying a +1.25D lens in front of the barrel in keratometry when the K reading is over 52.00D?
In recording keratometric measurements, what does 'MCAR' stand for?
In recording keratometric measurements, what does 'MCAR' stand for?
When initial K readings are less than 36.00D, what type of lens should be added in front of the barrel in keratometry?
When initial K readings are less than 36.00D, what type of lens should be added in front of the barrel in keratometry?
What is the average range of K readings expected in keratometry practice according to the provided text?
What is the average range of K readings expected in keratometry practice according to the provided text?
What does Javal's Rule help determine in the context of keratometry?
What does Javal's Rule help determine in the context of keratometry?
What should be done if irregular astigmatism is detected during keratometry?
What should be done if irregular astigmatism is detected during keratometry?
What is the recommended approach for observing corneal integrity in patients with dry eyes during keratometry?
What is the recommended approach for observing corneal integrity in patients with dry eyes during keratometry?
If a patient has ATR astigmatism, what can be expected about the curvature of their principal meridians?
If a patient has ATR astigmatism, what can be expected about the curvature of their principal meridians?
What should be recorded in addition to the amount of corneal astigmatism during keratometry?
What should be recorded in addition to the amount of corneal astigmatism during keratometry?
What distinguishes between regular astigmatism and irregular astigmatism in keratometry?
What distinguishes between regular astigmatism and irregular astigmatism in keratometry?
