In the calculation part - 1.5 is total astigmatism Now we know total = corneal + other Corneal astigmatism is +1 Hence other should be -2.5 D Where am I making the mistake
Watch the video again few times... 1.5 is total astigmatism that means 1.5 is combination of corneal astigmatism and internal astigmatism. So if we can identify corneal astigmatism from Keratometry and subtract it from from total astigmatism (1.5) then we will get internal astigmatism. In the Keratometry corneal astigmatism was 1 (difference between K1 & K2 is corneal astigmatism) so internal astigmatism will be: 1.5 - 1 = 0.50
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Samir Sutradhar.
In the calculation part
- 1.5 is total astigmatism
Now we know total = corneal + other
Corneal astigmatism is +1
Hence other should be -2.5 D
Where am I making the mistake
Watch the video again few times...
1.5 is total astigmatism that means 1.5 is combination of corneal astigmatism and internal astigmatism.
So if we can identify corneal astigmatism from Keratometry and subtract it from from total astigmatism (1.5) then we will get internal astigmatism.
In the Keratometry corneal astigmatism was 1 (difference between K1 & K2 is corneal astigmatism) so internal astigmatism will be: 1.5 - 1 = 0.50
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