Certain monster abilities require the target to be looking at them to be effective. Examples of such attacks are listed below.
Any detrimental effects from these abilities can be avoided entirely by facing away from the monster using them. However, many of these abilities can be readied quickly by the monster, and may be too quick for most players to be able to react to. In addition, it takes a certain amount of time for player movements to be recognized and registered by the game server; meaning that even if you tried to turn around in reaction to avoid a Gaze Attack, if the server has not recognized your movement yet, you will still be affected by the attack.
In some cases, certain players, primarily the mages and back-row jobs, will spend the entire fight facing away from the enemy being fought such that they are never affected by its Gaze Attacks, and are therefore better able to help the tanks and other melees recover from them. A type of enemy where this tactic is commonly employed is the Hecteyes, which can inflict paralysis with its ability Hex Eye. This is especially so against the NM Hecteyes Hakutaku, which tends to use Hex Eye in repeated succession. Healers afflicted with paralysis will have a hard time removing paralysis from their party members, including themselves, which can add great difficulty to the fight.
Monster Gaze Attacks
Species Attack Effect Apkallu Yawn All targets within 10' are afflicted with Sleep. Bugards Awful Eye Targets within a fan-shaped area have their Strength reduced. Cockatrice Baleful Gaze Target is petrified. Coeurls Chaotic Eye Target is silenced. Coeurls Blink of Peril Target is reduced to critical HP, or even K.O.'d instantly. Only used by the NM War Lynx fought as part of the quest The Tigress Strikes. Dhalmel Cold Stare Targets within a fan-shaped area are silenced. Dragons Petro Eyes Targets within a fan-shaped area are petrified. Gargouilles Terror Eye Targets in a fan-shaped area are Terrorized. Goobbues Blank Gaze Target is paralyzed. Hecteyes Hex Eye Targets within a fan-shaped area are paralyzed. Hecteyes Petrogaze Targets within a fan-shaped area are petrified. Hippogryphs Jettatura Targets within a fan-shaped area are terrorized. Lamiae Hypnotic Sway Target is inflicted with amnesia. Lizards Baleful Gaze Target is petrified. Moogles Washtub Target is afflicted with Terror. Opo-opos Blank Gaze One beneficial status effect of the target is dispelled. Orobon Hypnic Lamp All targets within 10' are afflicted with Sleep. Pugils Intimidate Targets within a fan-shaped area are Slowed. Tauri Mortal Ray Target is inflicted with Doom. Tonberries Light of Penance Target is inflicted with blindness and bind, and also has all TP removed.