1-Identify and list all core problems causing childhood blindness.
2-Identify related problems/constraints.
3-Arrange them in a logical sequence, e.g.: Low literacy rates among the women leading to lack of awareness which leads to lack of access to eye care facilities etc.
4-Draft the problem tree diagram. e.g.: Looks like a flow chart, in flow start we start from the first step and add further steps down to complete the sequence. Whereas in problem tree, start from placing all the core problems down and add more layers upwards showing the various sequence of issues causing final the effect on increased childhood blindness in the community.

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