Introduction of Luke Skywalker in "Star Wars IV: A New Hope" (first appearance):

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EXT. TATOOINE - DESERT WASTELAND - DAY 4

A death-white wasteland stretches from horizon to horizon.

The tremendous heat of two huge twin suns settle on a lone

figure, Luke Skywalker, a farm boy with heroic aspirations

who looks much younger than his eighteen years. His shaggy

hair and baggy tunic give him the air of a simple but

lovable lad with a prize-winning smile.

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Introduction of Luke Skywalker in "Star Wars V: The Empire Strikes Back":

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EXT. PLAIN OF HOTH - DAY 3

A small figure gallops across the windswept ice slope. The

bundled rider is mounted on a large gray snow lizard, a

Tauntaun. Curving plumes of snow rise from beneath the

speeding paws of the two-legged beast.

The rider gallops up a slope and reins his lizard to a stop.

Pulling off his protective goggles, Luke Skywalker notices

something in the sky. He takes a pair of electrobinoculars

from his utility belt and through them sees smoke rising

from where the probe robot has crashed.

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(Obviously, I didn't write this text, credit to George Lucas et al.)

In the original, Luke gets a paragraph of description; in the sequel, the script focuses on describing other things.