I’ve been searching places to get new glasses online, and one site asked me to choose a lens thickness and also said if I choose below a certain thickness of (ex. 1.6 lens index, called advanced-thin aspheric), then it may cause blurriness or discomfort due to a thicker lens. Should I go with what they recommend such as the 1.6 index which is for prescriptions between +2.00~+3.00/-3.00~-6.00? (I’m currently at -5.50/-5.75).Will it affect active focus? Thanks and happy new year!