Heavy quark production in $\gamma \gamma$ collisions

Current theoretical framework for the calculation of heavy quark production in $\gamma \gamma$ collisions is reviewed. The importance of including direct photon contributions up to the order ${\alpha }^2{\alpha }_s^2$ and of the proper choice of renormalization and factorization scales in the evaluation of $\sigma (\gamma \gamma \to Q\bar{Q})$ is emphasized.