What is the 7L rule for haptic orientation?

You must know instantly if the IOL is being implanted in the eye correctly. We have explained how the IOL should never be in the “S” configuration (S = stupid mistake because it would be upside-down).

It is easy to see the correct anti-S formation after the IOL is fully implanted, but what about when just the leading haptic is being inserted?

This is where the “7L” guideline helps: the first haptic should come out in the “7” configuration and the trailing haptic should be the “L” orientation.

click below to see the 7L rule in action as I deliver a misloaded IOL:


  1. Sir, I have a query
    While injecting lens are the clockwise–>anticlockwise movements mandatory for beginner surgeons or just injecting bevel down keeping in mind 7L rule is sufficient for safe lens delivery
    Thanks in advance

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