5 doctors weighed in:

What is The difference between keratoconus And severe astigmatism?

5 doctors weighed in
Dr. Neil Notaroberto
Ophthalmology
2 doctors agree

In brief: Keratoconus is

progressive disease of the cornea in which the normally dome shaped cornea thins and begins to bulge into a cone-like shape.
This condition needs to be monitored and possibly treated to prevent long term visual disability. Astigmatism is a refractive error, therefore it is not an eye disease it is an error in the focusing ability. Astigmatism is treated simply with glasses, contacts or surgery.

In brief: Keratoconus is

progressive disease of the cornea in which the normally dome shaped cornea thins and begins to bulge into a cone-like shape.
This condition needs to be monitored and possibly treated to prevent long term visual disability. Astigmatism is a refractive error, therefore it is not an eye disease it is an error in the focusing ability. Astigmatism is treated simply with glasses, contacts or surgery.
Dr. Neil Notaroberto
Dr. Neil Notaroberto
Thank
Dr. Paul Kuck
Ophthalmology - LASIK Surgery

In brief: Abnormal vs. normal

KC is when the structure and strength of the cornea is abnormal, and the cornea becomes cone shaped.
This causes IRREGULAR astigmatism (think of a lop-sided football). The steeper axis is greater on one side of the center than the other. Astigmatism, even severe form, is when the cornea is shaped like the surface of a football, steeper in one axis than the other, the same on both sides of center.

In brief: Abnormal vs. normal

KC is when the structure and strength of the cornea is abnormal, and the cornea becomes cone shaped.
This causes IRREGULAR astigmatism (think of a lop-sided football). The steeper axis is greater on one side of the center than the other. Astigmatism, even severe form, is when the cornea is shaped like the surface of a football, steeper in one axis than the other, the same on both sides of center.
Dr. Paul Kuck
Dr. Paul Kuck
Thank
Dr. Donald Alves
Emergency Medicine

In brief: Cone vs warp

Keratoconus is an abnormal conical shape of the cornea--sometimes severe enough that glasses cannot fully correct and surgery is considered.
Astigmatism is more like a warp or bend in the surface of the cornea in a specific location. It is possible to have both at the same time. Talk to your Eye Dr if further questions.

In brief: Cone vs warp

Keratoconus is an abnormal conical shape of the cornea--sometimes severe enough that glasses cannot fully correct and surgery is considered.
Astigmatism is more like a warp or bend in the surface of the cornea in a specific location. It is possible to have both at the same time. Talk to your Eye Dr if further questions.
Dr. Donald Alves
Dr. Donald Alves
Thank
Get help from a real doctor now
Dr. Peter Kurzweil
Board Certified,
48 years in practice
16M people helped
Continue
111,000 doctors available