The phrase "from the first sight" is correct and can be used in written English in both informal and formal contexts.
For example, you could say "I was hooked from the first sight of her stunning smile."
FROM the first sight of the hero in blue beret and combat gear emerging from behind a wall of riot shields, Ralph Fiennes's film of "Coriolanus" is a riveting update of a lesser known Shakespearean tragedy.
"It was love from the first sight".
A switch was made, and from the first sight of my mother's back, her long blond hair swaying loosely over her fair skin, my father couldn't keep his eyes off her, let alone his hands.
"From the first sight of when she stepped into the forecourt of the abbey, there was this gasp at the sight of this very elegant, poised, understated girl who everyone had previously classified as a middle-class party girl but who had turned into an elegant swan".
None of these happenings can be empirically tested, and very little can be observed directly: the whole story has had to be assembled by inference and conjecture, cautious observation and some serious mathematical physics, from the first sight of sunspots to the launch of space-based solar observatories.
In David McKay's lyrical translation, every detail has the heightened luminosity of poetry, from the first sight of a Zeppelin ("this dream-fish drifting silently over our heads") to a dead horse hanging from a broken elm ("perfectly straight, its bloody, half-severed head gruesomely twisted against the cool morning sky, its legs tangled in the remains of the tree like strange branches").
The Great British Sex Survey (Channel 4) was, as the astute-to-barely-sentient among you will no doubt have suspected from the first sighting of the title in your schedules, a pile of toss.
And from the first sighting of a parrot made of a feather duster and pliers, you know this is a production that will soar on a wing and a squawk.
According to an October survey map, the sluggish invaders had made it as far as 18 miles from the first sighting.
Let the imagination run free and find out all about the small creatures that are leprechauns - from the first sighting of the mythical pint-sized beings to the fairy-tales that surround them.
As a traveler approaches the shrine, which lies near a major freeway about half an hour from downtown Teheran, the first sight is two eight-story minarets, still under construction, and resting between them, the golden dome that covers the Ayatollah's tomb.
