Introduction:Astigmatism tends not change significantly in refractive surgeries. In the management of myopia and astigmatism , the treatment of astigmatism should consider the predicted astigmatic reduction that would be achieved by treating myopia alone as the relationship between total astigmatism by treating only spherical component of myopia. Aims: To assess the prevalence of astigmatism among myopic patients attending a tertiary eye hospital. Materials and methods: Cross sectional observational study in 200 patients of 10-30 years with myopic refractive error of – 0.5 D and above. Spherical power of -0.5 to -3 was considered as low myopia 3 to -6 was considered moderate myopia and greater than -6 was taken as high myopia. Results:Cylindrical power of greater than -0.25 was considered. Out of 200 study sample , 111(55.5%) subjects were from 11-20 years age group followed by 89(44.5%) subjects in 21-30 years age group. There were 104 females(52%) and 96 males (48%), the range of ages that were considered were 11-30 years . There is inverse correlation between myopia and total astigmatism. As the spherical power increased a stastically significant decrease in the cylindrical power was seen with Right eye correlation coefficient , r=-0.255: p=0.001, Left eye r=- 0.316: p=0.001. There was no correlation between myopia and corneal astigmatism. Right eye r=0.001: p=-0.995, LE r=-0.15: p=0.838. In right eye low myopia eyes, simple myopia was present in 51(20%) whereas 96(80%) had myopia with astigmatism. Among people with moderate myopia , simple myopia was present in 21.4%, 78.6%% had myopia with astigmatism. Among high myopia patients simple myopia was present in 9(15.6%) myopia with astigmatism in 27(84.4%). In left eye low myopia eyes, simple myopia was present in 27(21.8%) whereas 97(78.2%) had myopia with astigmatism. Among people with moderate myopia , simple myopia was present in 25.7%, 74.3%% had myopia with astigmatism. Among high myopia patients simple myopia was present in 4(11.4%) myopia with astigmatism in 31(88.6%). Conclusions: In our study relationship between myopia and astigmatism is established so potential application in knowing and estimating the progression of spherical and cylindrical power among the population.