Those two prongs are very common throughout Europe. Britain is more the exception. The whole system can be perplexing as it takes three prongs, sometimes four prongs here in the United States to get 220. If you are in Istanbul there are plenty of higher-end shops where you can get assurance that your system is safe.
In much of Turkey I would be more concerned with voltage modulation from the service. Perhaps you will feel better with a power conditioner that has the plugs you are more familiar with that can also plug into your two-pronged outlet.
In much of Turkey I would be more concerned with voltage modulation from the service. Perhaps you will feel better with a power conditioner that has the plugs you are more familiar with that can also plug into your two-pronged outlet.