  In this paper we examine the change in the estimated spatial power spectra at
decoupling due to the effects of our clumpy universe which modify observational
distances. We find that scales at decoupling can be significantly underestmated
in our approximation of neglecting the shear of the ray bundle. We compare our
results with other work on lensing and speculate on the implications for
structure formation. In particular we examine a proposal to use the position of
the first Doppler peak to determine $\Omega$, and find that shrinking will
modify the esimated curvature, so that it must be included to obtain an
accurate estimate of $\Omega$. Finally we consider future applications and
improvements of our results.
