Blind

• The target will miss auto-attacks, incurring the message "Miss" above their attack target.
• Blind only mitigates the physical damage portion of an attack, including physical damage sourced from a physical on-hit effect. Other damage types and effects won't miss.
• Abilities that apply on-hit effects will also miss.
• Blind is considered a form of damage mitigation. As such, it is applied after Thornmail's passive.
• Does not interrupt channeling.
• The duration is affected by crowd control reduction.
• The effect can be removed by all cleansing effects (except for Mikael's Crucible).
• Blind will not affect certain champion abilities.(e.g. Riven's passive Runic Blade)
• Champions with Blind: Heimerdinger, Teemo , Quinn and Valor, Shaco(non-champions only)

Blind

• The target will miss auto-attacks, incurring the message "Miss" above their attack target.
• Blind only mitigates the physical damage portion of an attack, including physical damage sourced from a physical on-hit effect. Other damage types and effects won't miss.
• Abilities that apply on-hit effects will also miss.
• Blind is considered a form of damage mitigation. As such, it is applied after Thornmail's passive.
• Does not interrupt channeling.
• The duration is affected by crowd control reduction.
• The effect can be removed by all cleansing effects (except for Mikael's Crucible).
• Blind will not affect certain champion abilities.(e.g. Riven's passive Runic Blade)
• Champions with Blind: Heimerdinger, Teemo , Quinn and Valor, Shaco(non-champions only)

Taken from the League of legends wiki.

Blind

• The target will miss auto-attacks, incurring the message "Miss" above their attack target.
• Blind only mitigates the physical damage portion of an attack, including physical damage sourced from a physical on-hit effect. Other damage types and effects won't miss.
• Abilities that apply on-hit effects will also miss.
• Blind is considered a form of damage mitigation. As such, it is applied after Thornmail's passive.
• Does not interrupt channeling.
• The duration is affected by crowd control reduction.
• The effect can be removed by all cleansing effects (except for Mikael's Crucible).
• Blind will not affect certain champion abilities.(e.g. Riven's passive Runic Blade)
• Champions with Blind: Heimerdinger, Teemo , Quinn and Valor, Shaco(non-champions only)

Blind

• The target will miss auto-attacks, incurring the message "Miss" above their attack target.
• Blind only mitigates the physical damage portion of an attack, including physical damage sourced from a physical on-hit effect. Other damage types and effects won't miss.
• Abilities that apply on-hit effects will also miss.
• Blind is considered a form of damage mitigation. As such, it is applied after Thornmail's passive.
• Does not interrupt channeling.
• The duration is affected by crowd control reduction.
• The effect can be removed by all cleansing effects (except for Mikael's Crucible).
• Blind will not affect certain champion abilities.(e.g. Riven's passive Runic Blade)
• Champions with Blind: Heimerdinger, Teemo , Quinn and Valor, Shaco(non-champions only)